Analysis And Estimation Of Trace Metals In Seawater And -Books Download

Analysis and Estimation of Trace Metals in Seawater and
22 Dec 2019 | 7 views | 0 downloads | 35 Pages | 1.47 MB

Share Pdf : Analysis And Estimation Of Trace Metals In Seawater And

Download and Preview : Analysis And Estimation Of Trace Metals In Seawater And


Report CopyRight/DMCA Form For : Analysis And Estimation Of Trace Metals In Seawater And



Transcription

Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters, General comparative considerations suggest atomic absorption spectroscopy and modern. voltametric methods particularly differential pulse stripping voltammetry with high sensitivity precision. and accuracy also a simple sample preparation and treatment to be the most promising chose for the. determination and characterization of toxic heavy metal traces in seawater. Material and Methods,Analytical methods, The concentrations of metals Cu Pb Cd Zn Ni Cr As and Hg in Vietnamese waters were. studied in the SEAFDEC interdepartmental collaborative research survey The samples were analyzed. in laboratory of the Department for Analytical Science and Technique of the Institute of Chemistry. National Center for Natural Science and Technology of Vietnam NCST. All bottles filter membranes and lab wares that would be contact with samples were carefully. pre washed by 10 suprapure HNO3 acid and Mili Q water Merck standard solutions diluted by. Mili Q water was use as standard, The concentrations of metals Cu Pb Cd Zn Cr Ni were measured using graphite furnace. atomic absorption spectrometer PE AAS 3300 USA and As by using hydride AAS technique with. MHS 10 Hg by using coldvapour method with MHS 10 and 746 VA Trace Analyzer Metrohm. Switzerland Polyethylene containers which have been previously cleaned with nitric acid then rinse. with water shall be used for sampling, Fifty eight stations from offshore of Vietnam from latitude 6oN to 21oN and longitude 103oE to. 112oE were established in this study Fig 1,VIE T NA M 2 7 4 08 0 0.
2 9 4 1 00 0,H a i P ho ng 1,H ai N a n Ta o,4 5 1 70 0. 5 5 1 7 00 Paracels Islan ds 16,TH AILA ND,20 19 18 17. C AM BO DIA,21 22 23 24 S outh,1 5 5 10 0 0,1 7 5 0 80 0. N ha Tra ng 12,28 27 26 25,2 0 5 08 30,2 0 5 1 0 0 0. V un g Ta o 29 30 31 32,Gul f 3 0 5 10 0 0,1 6 10 0 0.
Th a il an d 10,38 37 36 35 34 33,56 57 58 48,49 39 40 41. 55 54 53 50 47 44 43 42 Sp ratly Is lan ds,52 51 46 45 L e gen d. C TD data co llection,Test F ishin g T u na long lin e Jigg ing. A coustic su rvey transects,M A LAY SIA,102 104 1 06 108 10 12 14 E. Fig 1 Oceanographic Survey Station,Southeast Asian Fisheries Development Center.
MV SEAFDEC collected the water samples on 30 April 1999 to 29 May 1999 The water was. collected at each station during cruise at least two depth surface and bottom by water sampler attached. to a rosette system The water samples were transferred into acidic washed PE bottles and acidified to. pH 1 with suprapure nitric acid for determination of Cu Pb Cd Zn Ni Cr and As and with 1ml 10. K2Cr2O7 solution to 1 liter for determination of Hg Glass or other inert materials should be used if there. is a risk of interaction of the sample with the container. Determination of Cu Pb Cd Zn Ni and Cr, This method describes the determination of soluble copper lead cadmium zinc chromium. and nickel in seawater and other saline waters by the simultaneous extraction of their complexes with. ammonium pyrirolidine dithiocarbanate in to methyl isobutyl ketone and by the atomic absorption. spectrophotometer with the graphite tube technique Place 750ml aliquot of the sample acidified seawater. and each of the calibration solutions into series of 1 liter separating funnels fitted with. polytetrafluoroethylene PTFE taps, Add 35 ml of MIBK followed by 7ml of 1 APDC Shake vigorously for 30 min separate the. organic layer in a polypropylene bottle and store for analysis Allow the mixture to settle for at least 1h. away from light or heat in the stoppered funnel The settling time shall be strictly the same for all the. solutions Collect the organic layer taking care to avoid any trace of the aqueous phase centrifuge if. necessary carry out a blank test in parallel with the determination by the same procedure using the. same quantities of all the reagents as in the sampling and chelation and extraction but replacing the test. portion by water, Proceed as follows for each metal being determined Before carrying out the spectrometric. measurement set up spectrometer according to the manufacturer s instructions by aspirating the organic. extract of calibration solution of the metal being determined and using information in Table1. Optimize the aspiration and conditions Adjust the response of the instrument to zero absorbance. with MIBK For each metal being determined aspirate the set of organic extracts of the calibration. solutions Plot a graph having the metal contents in micrograms per liter of the calibration solutions as. abscissas and the corresponding values of absorbance as ordinates for example by measuring the. absorbance of a calibration solution every five samples Aspirate the organic extract of the test portion. Measure the absorbance of the metal being determined and after each measurement aspirate MIBK in. order to rinse the nebulizer system, Table 1 Wavelength nm used to determine metal element. E lem ent to be determ ined W a v eleng th n m,N ickel 2 32 0.
C op p er 3 24 7,Zinc 2 13 8,C ad m iu m 2 28 8,C hro m iu m 3 57 9. Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Determination of Mercury. Mercury ions are reduced to metallic mercury by NaBH4 entrancement of the mercury in a. current of inert gas at ambient temperature and determination of the mercury by flameless atomic. absorption spectrometry at a wavelength of 253 7nm. Take a test portion of 100 ml from the previously mixed sample containing not more than 0 5. mg of mercury Prepare just before use using the standard mercury solutions at least five calibration. solutions covering the range of concentrations which can be measured with the apparatus to be used. Treat each of these solutions immediately after their preparation in exactly the same way as the. test portion on which the determination is to carry out Also proceed in exactly the same way on a. solution in which the standard mercury solution is replaced with water. Set up the instrument in accordance with the manufacturer s introductions Transfer a volume. of sample solution into aeration flask in accordance with the manufacturer s introductions with on the. entrainment gas supply and let the developed mercury vapour flow through the absorption cell and. measure the absorption of atoms in the beam of the PE AAS 3300 by using of MHS 10 carry out. a blank test with each batch of samples but replacing the test portion with water and using the same. volume of reagents as for the determination prefer. Determination of Arsenic, The method is based on the atomic absorption measurement of arsenic generated by the thermal. decomposition of arsenic III hydride As III is reduced to gaseous arsenic III hydride AsH3 by. reaction with sodium tetrahydroborate in a hydrochloric acid medium. The absorbance is determined at a wavelength of 193 7nm Set all instrumental parameters of. the atomic absorption spectrometer in accordance with the manufacturer s operating manual and optimize. the position of the absorption cell in order to obtain maximum transmission of the light beam. Pass a stream of argon through the system and set the instrument to zero Measure the absorption. given by the solutions in the following order,Blank solution. Calibration solutions,Samples prepared as follows, Depending on the hydride system used transfer an appropriate volume of the sample solution.
to the reaction vessel MHS 10 Connect the reaction vessel to the hydride system pass argon. through the solution until the absorption signal of atomic absorption spectrometer returns to zero For. 20 ml of the sample solution add 5ml 0 1ml of sodium tetrahydroborate solution to the solution and. record the signal Repeat the procedure using separate portions of each solution Use the mean of these. results Establish the calibration curve using means of values obtained with the blank and calibration. Results and Discussion, Certified Reference Seawater Probe CASS 3 of the Institute for Environmental Chemistry. Canada were included in sample preparation and analysis as quality control samples to ensure the. Southeast Asian Fisheries Development Center, accuracy of the results The percentage recovery of copper was 102 5 lead was 116 6 cadmium. was 116 6 zinc was 108 9 nickel was 104 1 and chromium was 109 8 The result of analysis. indicated good recoveries of all determined metals Table 2. Table 2 Analytical performance based on Reference Seawater g l. Cu Pb Cd Zn Ni Cr,CASS 3 0 517 0 012 0 030 1 24 0 386 0 092. Our result 0 530 0 014 0 035 1 35 0 402 0 101, The concentration of the determined metals in seawater of survey cruise at surface and bottom. layer of sampling are presented in the Tables 3 4 5 6 7 8 9 and 10 in nM and Tables11 12 13 14. 15 16 17 and 18 in g l,Table 3 Cu Concentration in seawater.
S ta tio n S a m p le s C u n M S ta tio n S a m p le s C u n M S ta tio n S a m p le s C u n M. 1S 7 6 6 4 21S 6 5 1 6 41S 5 9 4 9,1B 9 0 3 4 21B 8 0 1 1 41B 7 9 1 6. 2S 7 3 8 1 22S 7 5 2 3 42S 5 8 0 7,2B 8 7 1 9 22B 7 2 7 1 42B 7 8 0 6. 3S 7 4 5 9 23S 7 2 7 1 43S 6 4 9 9,3B 7 5 3 8 23B 6 7 8 3 43B 7 5 8 6. 4S 7 9 0 0 24S 7 8 8 5 44S 6 0 1 2,4B 7 6 4 8 24B 7 9 1 6 44B 8 3 5 7. 5S 6 2 3 2 25S 7 5 0 7 45S 6 4 0 5,5B 8 0 5 8 25B 7 6 4 8 45B 7 9 4 8.
6S 6 7 9 9 26S 6 7 8 3 46S 5 8 0 7,6B 6 7 2 0 26B 8 0 5 8 46B 7 8 2 2. 7S 6 5 7 8 27S 7 6 0 1 47S 6 0 9 1,7B 6 7 8 3 27B 7 8 0 6 47B 7 6 0 2. 8S 5 8 8 6 28S 7 2 7 1 48S 6 4 9 9,8B 7 4 5 9 28B 7 9 1 6 48B 5 8 5 4. 9S 6 0 4 3 29S 7 5 0 7 49S 6 7 0 4,9B 6 7 0 4 29B 9 2 2 2 49B 6 4 0 5. 10S 6 0 7 5 30S 7 2 7 1 50S 6 1 8 5,10B 7 2 2 3 30B 8 5 3 0 50B 8 1 5 2.
11S 5 8 3 9 31S 6 2 0 1 51S 6 4 2 1,11B 7 2 5 5 31B 7 7 7 5 51B 7 6 1 7. 12S 5 1 9 3 32S 6 2 6 4 52S 7 8 8 5,12B 6 1 8 5 32B 8 1 0 5 52B 7 9 1 6. 13S 6 7 0 4 33S 6 7 9 9 53S 6 0 1 2,13B 7 2 7 1 33B 7 5 8 6 53B 7 3 8 1. 14S 6 1 8 5 34S 5 8 8 6 54S 5 8 0 7,14B 7 5 7 0 34B 7 4 9 1 54B 6 0 9 0. 15S 6 4 8 4 35S 6 4 8 4 55S 6 4 9 9,15B 8 0 5 8 35B 6 6 2 6 55B 8 0 7 4.
16S 6 0 4 3 36S 5 9 1 7 56B 6 3 7 4,16B 6 2 4 8 36B 6 1 0 6 56B 8 0 8 9. 17S 6 4 0 5 37S 6 7 8 3 57S 6 1 6 9,17B 7 4 1 3 37B 7 7 4 3 57B 7 8 3 7. 18S 5 9 1 7 38S 7 3 0 2 58S 7 0 5 0,18B 7 5 8 6 38B 5 8 8 6 58B 7 4 2 8. 19S 6 2 0 1 39S 6 9 0 9,19 39 N o te,19B 7 4 9 1 39B 7 6 6 4. S S u r fa c e la y e r 2 m,20S 6 0 9 1 40S 5 9 9 6.
20 40 B B o tto m la y e r 1 0 0 m,20B 7 6 8 0 40B 8 0 5 8. Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Table 4 Pb Concentration in seawater. Station Samples Pb nM Station Samples Pb nM Station Samples Pb nM. 1S 9 56 21S 8 73 41S 9 75,1B 10 52 21B 9 85 41B 8 49. 2S 9 79 22S 8 40 42S 8 11,2B 13 18 22B 9 03 42B 8 59. 3S 8 40 23S 8 16 43S 9 22,3B 9 51 23B 9 27 43B 11 29.
4S 10 23 24S 7 63 44S 8 59,4B 11 15 24B 10 33 44B 9 75. 5S 8 49 25S 9 80 45S 7 58,5B 10 81 25B 9 07 45B 15 01. 6S 9 07 26S 9 51 46S 7 82,6B 8 97 26B 11 29 46B 11 87. 7S 8 49 27S 10 23 47S 9 80,7B 11 25 27B 13 61 47B 9 56. 8S 8 30 28S 10 52 48S 8 78,8B 8 83 28B 14 38 48B 11 25.
9S 7 58 29S 9 75 49S 9 46,9B 9 85 29B 10 62 49B 8 83. 10S 8 83 30S 8 49 50S 8 25,10B 10 96 30B 11 25 50B 9 70. 11S 9 27 31S 7 14 51S 8 16,11B 11 82 31B 11 63 51B 9 46. 12S 9 70 32S 8 40 52S 8 69,12B 9 60 32B 11 29 52B 11 92. 13S 8 54 33S 7 82 53S 7 34,13B 10 28 33B 11 97 53B 14 07.
14S 8 11 34S 9 22 54S 7 14,14B 7 78 34B 8 64 54B 9 27. 15S 8 88 35S 8 78 55S 8 56,15B 7 82 35B 11 48 55B 7 87. 16S 7 58 36S 9 70 56B 7 53,16B 6 95 36B 10 23 56B 9 60. 17S 9 75 37S 8 40 57S 8 40,17B 6 66 37B 6 47 57B 8 45. 18S 6 37 38S 8 11 58S 10 52,18B 7 53 38B 10 81 58B 10 52.
19S 7 05 39S 8 74,19 39 Note,19B 8 78 39B 9 51,S Surface layer 2m. 20S 9 70 40S 8 30,20 40 B Bottom layer 100m,20B 8 54 40B 8 40. Southeast Asian Fisheries Development Center,Table 5 Cd Concentration in seawater. Station Samples Cd nM Station Samples Cd nM Station Samples Cd nM. 1S 1 86 21S 2 05 41S 1 25,1B 2 14 21B 1 33 41B 2 31. 2S 1 95 22S 1 60 42S 1 42,2B 2 31 22B 2 05 42B 2 40.
3S 1 69 23S 1 42 43S 1 07,3B 2 05 23B 1 60 43B 2 58. 4S 1 51 24S 1 33 44S 1 16,4B 1 42 24B 1 42 44B 2 14. 5S 1 78 25S 1 86 45S 0 98,5B 1 51 25B 1 69 45B 2 22. 6S 1 60 26S 1 69 46S 2 67,6B 1 96 26B 1 95 46B 2 40. 7S 1 51 27S 1 51 47S 2 49,7B 1 16 27B 2 31 47B 2 58.
8S 1 42 28S 1 60 48S 1 25,8B 1 33 28B 2 76 48B 2 67. 9S 1 60 29S 2 31 49S 1 86,9B 1 33 29B 2 85 49B 1 60. 10S 1 33 30S 1 51 50S 2 31,10B 2 05 30B 2 76 50B 2 05. 11S 1 07 31S 1 69 51S 1 78,11B 2 14 31B 2 49 51B 2 31. 12S 0 98 32S 1 95 52S 1 51,12B 2 40 32B 2 14 52B 3 38.
13S 1 16 33S 1 25 53S 1 42,13B 2 76 33B 2 31 53B 3 91. 14S 1 60 34S 1 16 54S 1 25,14B 1 25 34B 1 07 54B 3 11. 15S 1 07 35S 1 33 55S 1 07,15B 1 42 35B 1 51 55B 2 14. 16S 1 25 36S 1 51 56B 2 55,16B 1 25 36B 2 14 56B 2 49. 17S 1 69 37S 1 80 57S 0 98,17B 1 86 37B 2 67 57B 2 85.
18S 1 42 38S 1 95 58S 2 05,18B 1 95 38B 1 69 58B 5 05. 19S 1 86 39S 2 67,19 39 Note,19B 1 16 39B 3 39,S Surface layer 2m. 20S 2 67 40S 1 51,20 40 B Bottom layer 100m,20B 1 07 40B 2 14. Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Table 6 Zn Concentration in seawater. Station Samples Zn nM Station Samples Zn nM Station Samples Zn nM. 1S 156 52 21S 156 68 41S 136 96,1B 188 38 21B 118 45 41B 147 73.
2S 149 36 22S 134 38 42S 146 97,2B 180 65 22B 155 31 42B 133 17. 3S 133 32 23S 120 43 43S 134 08,3B 181 11 23B 134 38 43B 154 86. 4S 145 91 24S 158 95 44S 133 17,4B 162 90 24B 138 63 44B 168 06. 5S 152 13 25S 132 56 45S 172 00,5B 150 46 25B 135 59 45B 158 05. 6S 150 46 26S 145 91 46S 161 83,6B 147 27 26B 157 14 46B 147 73.
7S 127 10 27S 152 73 47S 163 96,7B 132 87 27B 170 02 47B 146 82. 8S 127 71 28S 150 00 48S 132 56,8B 137 57 28B 188 38 48B 150 76. 9S 133 59 29S 151 22 49S 131 65,9B 149 85 29B 174 27 49B 156 53. 10S 162 75 30S 156 37 50S 136 96,10B 156 38 30B 182 92 50B 167 91. 11S 133 47 31S 146 06 51S 133 17,11B 158 05 31B 198 99 51B 203 55.
12S 141 36 32S 147 43 52S 140 45,12B 135 59 32B 173 82 52B 161 99. 13S 115 42 33S 134 53 53S 150 16,13B 138 63 33B 164 11 53B 150 46. 14S 133 47 34S 142 42 54S 126 04,14B 131 50 34B 176 24 54B 134 08. 15S 141 97 35S 140 15 55S 150 46,15B 131 05 35B 148 49 55B 156 53. 16S 133 32 36S 157 44 56B 150 64,16B 139 81 36B 172 00 56B 167 75.
17S 123 31 37S 134 54 57S 152 13,17B 140 45 37B 148 95 57B 173 82. 18S 154 86 38S 150 61 58S 102 53,18B 163 50 38B 146 97 58B 187 17. 19S 150 15 39S 139 08,19 39 Note,19B 155 01 39B 156 53. S Surface layer 2m,20S 167 14 40S 133 32,20 40 B Bottom layer 100m. 20B 138 21 40B 161 98,Southeast Asian Fisheries Development Center.
Table 7 Ni Concentration in seawater, Station Samples Ni nM Station Samples Ni nM Station Samples Ni nM. 1S 20 61 21S 17 54 41S 13 29,1B 36 62 21B 25 89 41B 29 47. 2S 27 59 22S 28 62 42S 27 93,2B 33 73 22B 24 87 42B 21 80. 3S 25 21 23S 22 82 43S 29 64,3B 39 35 23B 27 59 43B 24 19. 4S 23 34 24S 21 63 44S 22 14,4B 34 41 24B 28 96 44B 22 65.
5S 19 08 25S 19 76 45S 21 46,5B 29 47 25B 32 19 45B 36 45. 6S 17 20 26S 25 21 46S 22 31,6B 29 98 26B 27 59 46B 34 41. 7S 33 73 27S 34 24 47S 20 09,7B 24 53 27B 27 93 47B 33 38. 8S 19 07 28S 24 18 48S 19 08,8B 25 21 28B 25 89 48B 32 02. 9S 14 82 29S 27 59 49S 17 20,9B 27 59 29B 28 96 49B 29 64.
10S 16 01 30S 25 04 50S 30 83,10B 30 83 30B 41 05 50B 35 09. 11S 21 46 31S 23 51 51S 29 13,11B 30 49 31B 39 69 51B 36 28. 12S 23 51 32S 21 97 52S 17 54,12B 22 82 32B 42 24 52B 37 13. 13S 22 82 33S 24 02 53S 16 86,13B 21 46 33B 36 96 53B 39 86. 14S 24 19 34S 29 47 54S 31 68,14B 21 80 34B 39 86 54B 33 72.
15S 15 33 35S 27 59 55S 22 31,15B 34 58 35B 30 99 55B 32 70. 16S 18 90 36S 22 82 56B 26 92,16B 18 90 36B 29 98 56B 31 85. 17S 18 39 37S 15 67 57S 21 12,17B 19 42 37B 30 83 57B 34 41. 18S 20 27 38S 16 52 58S 19 25,18B 20 10 38B 34 58 58B 31 34. 19S 20 44 39S 23 80,19 39 Note,19B 23 34 39B 29 97.
S Surface layer 2m,20S 19 25 40S 16 86,20 40 B Bottom layer 100m. 20B 24 87 40B 39 86, Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Table 8 Cr Concentration in seawater. Station Samples Cr nM Station Samples Cr nM Station Samples Cr nM. 1S 23 08 21S 16 54 41S 16 73,1B 22 12 21B 13 08 41B 27 31. 2S 19 80 22S 15 19 42S 17 69,2B 24 23 22B 14 23 42B 16 73.
3S 18 85 23S 14 23 43S 24 42,3B 18 85 23B 15 19 43B 26 35. 4S 18 46 24S 21 73 44S 16 54,4B 16 15 24B 21 35 44B 27 30. 5S 15 96 25S 20 00 45S 34 81,5B 25 38 25B 19 04 45B 24 23. 6S 18 65 26S 22 31 46S 25 00,6B 27 12 26B 23 66 46B 22 69. 7S 19 42 27S 18 85 47S 24 23,7B 20 77 27B 20 77 47B 25 38.
8S 16 35 28S 14 62 48S 21 15,8B 30 77 28B 21 54 48B 23 65. 9S 21 54 29S 25 39 49S 14 82,9B 15 77 29B 24 23 49B 24 04. 10S 14 62 30S 17 31 50S 15 19,10B 23 46 30B 25 00 50B 35 00. 11S 17 69 31S 16 54 51S 16 54,11B 18 08 31B 21 35 51B 26 73. 12S 16 73 32S 13 85 52S 15 38,12B 26 16 32B 16 92 52B 23 37.
13S 21 35 33S 16 15 53S 20 58,13B 23 85 33B 19 04 53B 28 46. 14S 18 46 34S 15 77 54S 21 54,14B 25 19 34B 25 58 54B 25 00. 15S 26 54 35S 15 19 55S 18 85,15B 20 96 35B 23 85 55B 33 85. 16S 14 23 36S 25 77 56B 15 92,16B 22 18 36B 16 73 56B 30 39. 17S 14 82 37S 22 31 57S 15 00,17B 16 73 37B 17 69 57B 37 31.
18S 23 27 38S 17 31 58S 20 38,18B 15 19 38B 25 58 58B 25 38. 19S 25 00 39S 25 19,19 39 Note,19B 16 92 39B 24 23. S Surface layer 2m,20S 17 69 40S 25 77,20 40 B Bottom layer 100m. 20B 18 08 40B 25 19,Southeast Asian Fisheries Development Center. Table 9 As Concentration in seawater, Station Samples As nM Station Samples As nM Station Samples As nM.
1S 21 22 21S 20 82 41S 23 62,1B 17 22 21B 18 55 41B 21 49. 2S 22 29 22S 19 22 42S 22 02,2B 20 15 22B 16 68 42B 23 89. 3S 17 48 23S 20 28 43S 21 76,3B 21 49 23B 19 35 43B 23 62. 4S 27 76 24S 24 56 44S 23 22,4B 21 75 24B 22 82 44B 26 83. 5S 23 89 25S 18 15 45S 21 36,5B 17 61 25B 19 22 45B 21 36.
6S 20 55 26S 22 56 46S 24 16,6B 20 55 26B 20 02 46B 28 83. 7S 32 70 27S 20 83 47S 27 76,7B 21 88 27B 18 15 47B 19 09. 8S 21 22 28S 19 75 48S 25 09,8B 21 49 28B 18 01 48B 22 02. 9S 30 96 29S 23 09 49S 23 49,9B 21 62 29B 20 82 49B 29 09. 10S 26 29 30S 21 22 50S 23 22,10B 18 82 30B 20 42 50B 22 96.
11S 33 37 31S 17 75 51S 26 96,11B 19 09 31B 78 95 51B 20 28. 12S 21 16 32S 21 22 52S 21 89,12B 20 95 32B 24 16 52B 23 22. 13S 21 22 33S 22 69 53S 20 42,13B 20 15 33B 19 22 53B 24 69. 14S 21 49 34S 23 09 54S 19 62,14B 20 28 34B 19 75 54B 24 96. 15S 19 62 35S 20 42 55S 21 89,15B 21 36 35B 23 49 55B 24 16.
16S 19 22 36S 26 03 56B 23 36,16B 18 68 36B 38 03 56B 19 35. 17S 23 89 37S 19 88 57S 19 89,17B 16 82 37B 19 49 57B 26 43. 18S 17 88 38S 16 42 58S 20 55,18B 19 62 38B 19 49 58B 18 82. 19S 23 49 39S 21 22,19 39 Note,19B 19 62 39B 20 55. S Surface layer 2m,20S 21 76 40S 19 62,20 40 B Bottom layer 100m.
20B 20 82 40B 21 08, Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Table 10 Hg Concentration in seawater. Station Samples Hg nM Station Samples Hg nM Station Samples Hg nM. 1S 0 60 21S 0 85 41S 0 79,1B 0 55 21B 0 35 41B 0 89. 2S 0 55 22S 0 45 42S 0 85,2B 0 69 22B 0 35 42B 0 89. 3S 0 59 23S 0 45 43S 0 85,3B 0 69 23B 1 24 43B 0 89.
4S 0 40 24S 0 49 44S 0 85,4B 0 40 24B 0 49 44B 0 80. 5S 0 59 25S 0 45 45S 0 49,5B 0 85 25B 0 41 45B 0 82. 6S 0 75 26S 0 49 46S 0 60,6B 0 55 26B 0 45 46B 0 45. 7S 0 75 27S 0 45 47S 0 49,7B 0 55 27B 0 35 47B 0 60. 8S 6 48 28S 0 35 48S 0 60,8B 0 49 28B 0 49 48B 3 60.
9S 1 54 29S 0 99 49S 0 70,9B 0 89 29B 0 89 49B 1 05. 10S 0 59 30S 0 45 50S 2 09,10B 0 60 30B 0 75 50B 1 45. 11S 0 70 31S 0 65 51S 0 60,11B 0 70 31B 0 65 51B 0 55. 12S 0 75 32S 0 89 52S 0 55,12B 0 45 32B 0 60 52B 0 55. 13S 0 55 33S 0 80 53S 0 65,13B 0 45 33B 3 09 53B 0 65.
14S 0 40 34S 1 69 54S 0 60,14B 0 80 34B 0 85 54B 0 49. 15S 0 41 35S 0 60 55S 0 80,15B 0 65 35B 0 70 55B 0 49. 16S 0 35 36S 0 75 56B 0 60,16B 0 49 36B 089 56B 7 13. 17S 0 35 37S 0 45 57S 1 20,17B 0 41 37B 0 75 57B 0 89. 18S 0 55 38S 0 60 58S 0 60,18B 0 89 38B 0 75 58B 2 46.
19S 0 45 39S 0 70,19 39 Note,19B 0 41 39B 0 95,S Surface layer 2m. 20S 0 55 40S 0 60,20 40 B Bottom layer 100m,20B 0 90 40B 2 59. Southeast Asian Fisheries Development Center,Table 11 Cu Concentration in seawater. Station Samples Cu g l Station Samples Cu g l Station Samples Cu g l. 1S 4 87 21S 4 14 41S 3 78,1B 5 74 21B 5 09 41B 5 03. 2S 4 69 22S 4 78 42S 3 69,2B 5 54 22B 4 62 42B 4 96.
3S 4 74 23S 4 62 43S 4 13,3B 4 79 23B 4 31 43B 4 82. 4S 5 02 24S 5 01 44S 3 82,4B 4 86 24B 5 03 44B 5 31. 5S 3 96 25S 4 77 45S 4 07,5B 5 12 25B 4 86 45B 5 05. 6S 4 32 26S 4 31 46S 3 69,6B 4 27 26B 5 12 46B 4 97. 7S 4 18 27S 4 83 47S 3 87,7B 4 31 27B 4 96 47B 4 83.
8S 3 74 28S 4 62 48S 4 13,8B 4 74 28B 5 03 48B 3 72. 9S 3 84 29S 4 77 49S 4 26,9B 4 26 29B 5 86 49B 4 07. 10S 3 86 30S 4 62 50S 3 93,10B 4 59 30B 5 42 50B 5 18. 11S 3 71 31S 3 94 51S 4 08,11B 4 61 31B 4 94 51B 4 84. 12S 3 30 32S 3 98 52S 5 01,12B 3 93 32B 5 15 52B 5 03.
13S 4 26 33S 4 32 53S 3 82,13B 4 62 33B 4 82 53B 4 69. 14S 3 93 34S 3 74 54S 3 69,14B 4 81 34B 4 76 54B 3 87. 15S 4 12 35S 4 12 55S 4 13,15B 5 12 35B 4 21 55B 5 13. 16S 3 84 36S 3 76 56B 4 05,16B 3 97 36B 3 88 56B 5 14. 17S 4 07 37S 4 31 57S 3 92,17B 4 71 37B 4 92 57B 4 98.
18S 3 76 38S 4 64 58S 4 48,18B 4 82 38B 3 74 58B 4 72. 19S 3 94 39S 4 39,19 39 Note,19B 4 76 39B 4 87,S Surface layer 2m. 20S 3 87 40S 3 81,20 40 B Bottom layer 100m,20B 4 88 40B 5 12. Proceedings of the SEAFDEC Seminar on Fishery Resources. in the South China Sea Area IV Vietnamese Waters,Table 12 Pb Concentration in seawater. Station Samples Pb g l Station Samples Pb g l Station Samples Pb g l. 1S 1 98 21S 1 81 41S 2 02,1B 2 18 21B 2 04 41B 1 76.
2S 2 03 22S 1 74 42S 1 68,2B 2 73 22B 1 87 42B 1 78. 3S 1 74 23S 1 69 43S 1 91,3B 1 97 23B 1 92 43B 2 34. 4S 2 12 24S 1 58 44S 1 78,4B 2 31 24B 2 14 44B 2 02. 5S 1 76 25S 2 03 45S 1 57,5B 2 24 25B 1 88 45B 3 11. 6S 1 88 26S 1 97 46S 1 62,6B 1 86 26B 2 34 46B 2 46.
7S 1 76 27S 2 12 47S 2 03,7B 2 33 27B 2 82 47B 1 98. 8S 1 72 28S 2 18 48S 1 82,8B 1 83 28B 2 98 48B 2 33. 9S 1 57 29S 2 02 49S 1 96,9B 2 04 29B 2 20 49B 1 83. 10S 1 83 30S 1 76 50S 1 71,10B 2 27 30B 2 33 50B 2 01. 11S 1 92 31S 1 48 51S 1 69,11B 2 45 31B 2 41 51B 1 96.
12S 2 01 32S 1 74 52S 1 80,12B 1 99 32B 2 34 52B 2 47. 13S 1 77 33S 1 62 53S 1 52,13B 2 13 33B 2 48 53B 2 91. 14S 1 68 34S 1 91 54S 1 48,14B 1 61 34B 1 79 54B 1 92. 15S 1 84 35S 1 82 55S 1 77,15B 1 62 35B 2 38 55B 1 63. 16S 1 57 36S 2 01 56B 1 56,16B 1 44 36B 2 12 56B 1 99.
17S 2 02 37S 1 74 57S 1 74,17B 1 38 37B 1 34 57B 1 76. 18S 1 32 38S 1 68 58S 2 18,18B 1 56 38B 2 24 58B 2 18. 19S 1 46 39S 1 81,19 39 Note,19B 1 82 39B 1 97,S Surface layer 2m. 20S 2 01 40S 1 72,20 40 B Bottom layer 100m,20B 1 77 40B 1 74. Southeast Asian Fisheries Development Center,Table 13 Cd Concentration in seawater.
Station Samples Cd g l Station Samples Cd g l Station Samples Cd g l. 1S 0 21 21S 0 23 41S 0 14,1B 0 24 21B 0 15 41B 0 26. 2S 0 22 22S 0 18 42S 0 16,2B 0 26 22B 0 23 42B 0 27. 3S 0 19 23S 0 16 43S 0 12,3B 0 23 23B 0 18 43B 0 29. 4S 0 17 24S 0 15 44S 0 13,4B 0 16 24B 0 16 44B 0 24. 5S 0 20 25S 0 21 45S 0 11,5B 0 17 25B 0 19 45B 0 25.
6S 0 18 26S 0 19 46S 0 30,6B 0 22 26B 0 22 46B 0 27. 7S 0 17 27S 0 17 47S 0 28,7B 0 13 27B 0 26 47B 0 29. 8S 0 16 28S 0 18 48S 0 14,8B 0 15 28B 0 31 48B 0 30. 9S 0 18 29S 0 26 49S 0 21,9B 0 15 29B 0 32 49B 0 18. 10S 0 15 30S 0 17 50S 0 26,10B 0 23 30B 0 31 50B 0 23.
11S 0 12 31S 0 19 51S 0 20,11B 0 24 31B 0 28 51B 0 26. 12S 0 11 32S 0 22 52S 0 17,12B 0 27 32B 0 24 52B 0 38. 13S 0 13 33S 0 14 53S 0 16,13B 0 31 33B 0 26 53B 0 44. 14S 0 18 34S 0 13 54S 0 14,14B 0 14 34B 0 12 54B 0 35. 15S 0 12 35S 0 15 55S 0 12,15B 0 16 35B 0 17 55B 0 24.
16S 0 14 36S 0 17 56B 0 29,16B 0 14 36B 0 24 56B 0 28. 17S 0 19 37S 0 20 57S 0 11,17B 0 21 37B 0 30 57B 0 32. 18S 0 16 38S 0 22 58S 0 23,18B 0 22 38B 0 19 58B 0 57. 19S 0 21 39S 0 30,19 39 Note,19B 0 13 39B 0 38,S Surface layer 2m. 20S 0 30 40S 0 17,20 40 B Bottom layer 100m,20B 0 12 40B 0 24.


Related Books

7v7 Formations - usys-assets.ae-admin.com

7v7 Formations usys assets ae admin com

7v7 Formations Players Roles in a 1-3-2-1 Players Roles #1 Goal-Keeper: Be patient in the build up, look to play out of the back with the defenders or midfielders. #2/7 & #3/11 Outside Backs/Wingers: Get wide in the build up and look to move forward with the ball. Attacks have to start deep but must have the energy to get up

Essentials in Hospice and Palliative Care

Essentials in Hospice and Palliative Care

Katherine Murray Katherine Murray RN, BSN, MA, FT, CHPCN(C) Essentials in Hospice and Palliative Care: A RESOURCE FOR NURSING ASSISTANTS

BBC Project Management Competency Framework

BBC Project Management Competency Framework

Benefits of competency framework 2 BBC project management competency framework Right people, right roles, increased mobility Capability assessment

NON-TRADITIONAL HOUSES

NON TRADITIONAL HOUSES

The lists of house types by Local Authority are drawn from a number of surveys carried out since 1980 for the (then) ... How to use Non-traditional houses ...

Vivace Feel the colours of life

Vivace Feel the colours of life

Vivace | Wiring Accessories 2013 3 With a slim and trim profile, the sleek clean lines and subtle curves manifest an art of simple, elegant minimalism. Every piece in this robustly constructed range sits perfectly within the context of any modern interior design. Vivace, a style of modern simplicity now available in White and

INSTRUCTIONS FOR THE 2017 DIVERSITY IMMIGRANT VISA PROGRAM ...

INSTRUCTIONS FOR THE 2017 DIVERSITY IMMIGRANT VISA PROGRAM

INSTRUCTIONS FOR THE 2017 DIVERSITY IMMIGRANT ... or child who is already a U.S. citizen or a Lawful Permanent Resident, ... Number of children ...

Last Name First Name Header Heeler Abriol Dunhill 3 4 ...

Last Name First Name Header Heeler Abriol Dunhill 3 4

Last Name First Name Header Heeler Abriol Dunhill 3 4 Achilles Damien 3 3 Acton Renee 3 3 Adams Hal 3 3 Adamson Michael 4 3 Alchin Rodney 3 3 Alders Brooke 3 3 Allen Peter 5.5 4 Allen Julie 3 3 Allen Paul 3 3 Anderson Rob 5 4 Anderson Scott 4 4 Anderson Wayne 4 4 Anderson Alistair 3 4 Angland Rhys 4 4 Apps Geoff 3 3 Ariens Walt 4 3 Armitage Bob 4.5 3 Ash Barry 2 2 Ash Kym 2 2 Atkins Debbie 2 2 ...

Pioneer Battalions - Library and Archives Canada

Pioneer Battalions Library and Archives Canada

Guide to Sources Relating to Units of the Canadian Expeditionary Force 4 DHS file RG 24, vol. 1908, file DHS 5-10-6 Historical chart RG 24, vol. 1833, file GAQ 8-32

MATHEMATICS 10 TO 12 - British Columbia

MATHEMATICS 10 TO 12 British Columbia

recommended as part of the Western Canadian Protocol (WCP) Mathematics Learning Resource Evaluation. The WCP recommended learning resources have been approved by the Minister and have been incorporated into the Grade Collection for each course. The Grade Collection package contains a grade collection chart for Applications of Mathematics 10 to 12 and Principles of Mathematics 10 to 12. These ...

by Debbie Miller Community

by Debbie Miller Community

Community: Creating a Culture and a Climate for Thinking Early September ... Greyling by Jane Yolen I Am the Ocean by Suzanna Marshak Mountain Streams