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Determination of heavy metals in seawater and in marine organisms by flameless atomic absorption spectrophotometry
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C. ChemicalOceanography
rescence remains nearly constant for several months. The relation between fluorescence of the filters and the chlorophyll plus phaeopigments concentration is linear up to 6.6 m g / m 3. Error of the determinations is 60%. ORSTOM, B.P.A 5 Noumea, New Caledonia.
82:5990 Eskilsson, Heldn and Daniel Jagner, 1982. Potentiometric stripping analysis for bismuth (III) in seawater. Analytica chim. Acta, 138:27-33. Total Bi in seawater was determined directly by computerized potentiometric stripping analysis after acidification (0.1 M HC1) or co-precipitation (MgOH). Preconcentration was necessary because of the very low concentrations of Bi. Analysis of 3 Kattegat surface seawater samples showed Bi concentrations ranging 5-12 pM (1-2.5 ng/L). Jagner: Dept. of Analy. and Mar. Chem., Univ. of Goteborg, S-412 96 Goteborg, Sweden. (bwt) 82:5991 Johansson, O. and M. Wedborg, 1982. On the evaluation of potentiometrie titrations of seawater with hydrochloric acid. Oceanologica Acta, 5(2): 209-218. Direct minimization and modified Marquardt algorithms are used for non-linear curve-fitting procedures which are tested on theoretical titration data. Effects of introducing various errors are studied. Other methods of evaluation and use of various pH scales are discussed. Dept. of Analy. and Mar. Chem., Chalmers Univ. of Tech., S-412 96 Goteborg, Sweden.
82:5992 Miyazaki, Akira, Akira Kimura and Yoshimi Umezaki, 1982. Indirect determination of sub-ng mL-~ levels of phosphorus in waters by di-isobutyl ketone [DIBK] extraction of reduced molybdoantimonylpbosphoric acid and inductively-coupled plasma emission spectrometry. Analytica chim. Acta, 138:121-127. A modified method for the indirect determination of trace levels of P in natural waters involves extracting reduced molybdoantimonylphosphoric acid into organic solvent followed by inductively-coupled plasma emission spectrometry. This sensitive and precise method is simpler than others previously reported because DIBK's low solubility in water eliminates acid-washing of the extract, a step which is time consuming and risks sample loss. Natl. Res. Inst. for Poll. and Resources, Yatabe, Ibaraki 305, Japan. (bwt)
OLR (1982) 29 (12)
82:5993 Persson, J.-A. and Knut lrgum, 1982. Determination of dimethylarsinic acid in seawater in the subPPB range by electrothermal atomic absorption spectrometry after preconcentration on an ionexchange column. Analytica chim. Acta, 138:111119. Dimethylarsinate is first pre-concentrated on cation-exchange resin and separated from interfering components (other arsenicals, group I and II metals). Graphite furnace AAS is used as a sensitive and specific detector. This method can be applied to all natural waters; for a 20 mL sample 'containing a 105-fold excess of inorganic As,' the detection limit is 0.02 ng As/mL. Dept. of Analy. Chem., Univ. of Umea, S-901 87 Umea, Sweden. (bwt)
82:5994 Sperling, K.-R., 1982. Determination of heavy metals in seawater and in marine organisms by flameless atomic absorption spectrophotometry. XV. Matrix effects in graphite tube atomizers and ways to overcome them. Z. analyt. Chem., 311(7):656-664. Biol. Anstalt Helgoland, Labor Sulldorf, Wustland 2, D-2000 Hamburg 55, FRG. 82:5995 Williams, P.J. leB. and N.W. Jenkinson, 1982. A transportable microprocessor-controlled precise Winkler titration suitable for field station and shipboard use. Limnol. Oceanogr., 27(3):576-584. An automatic Winkler titration, based on a photometric end-point detector, is controlled by a system based on an RCA 1800 series microprocessor, takes ~ 3 - 4 min, and in normal use has a coefficient of variation in the range 0.03-0.1%. Dept. of Oceanogr., The Univ., Southampton, SO9 5NH, UK.
C40. Area studies, surveys 82:5996 De Souza, F.P., 1982. Fluoride, bromide and iodide in the Arabian Sea. Indian J. mar. Sci., 11(2):173174. Fluoride concentrations varied from 1.32 m g / L at the surface to 1.37 mg/L at depth with F/C1 of (6.65_+ 0.07) x 10 5. Average bromide was 70 mg/L with Br/C1 of 0.00347. Bromide bore a fairly constant ratio to chlorinity. Concentrations of iodide were small (0.01-0.024 mg/L) with higher concentrations in the surface and bottom layers. Results
C. ChemicalOceanography
rescence remains nearly constant for several months. The relation between fluorescence of the filters and the chlorophyll plus phaeopigments concentration is linear up to 6.6 m g / m 3. Error of the determinations is 60%. ORSTOM, B.P.A 5 Noumea, New Caledonia.
82:5990 Eskilsson, Heldn and Daniel Jagner, 1982. Potentiometric stripping analysis for bismuth (III) in seawater. Analytica chim. Acta, 138:27-33. Total Bi in seawater was determined directly by computerized potentiometric stripping analysis after acidification (0.1 M HC1) or co-precipitation (MgOH). Preconcentration was necessary because of the very low concentrations of Bi. Analysis of 3 Kattegat surface seawater samples showed Bi concentrations ranging 5-12 pM (1-2.5 ng/L). Jagner: Dept. of Analy. and Mar. Chem., Univ. of Goteborg, S-412 96 Goteborg, Sweden. (bwt) 82:5991 Johansson, O. and M. Wedborg, 1982. On the evaluation of potentiometrie titrations of seawater with hydrochloric acid. Oceanologica Acta, 5(2): 209-218. Direct minimization and modified Marquardt algorithms are used for non-linear curve-fitting procedures which are tested on theoretical titration data. Effects of introducing various errors are studied. Other methods of evaluation and use of various pH scales are discussed. Dept. of Analy. and Mar. Chem., Chalmers Univ. of Tech., S-412 96 Goteborg, Sweden.
82:5992 Miyazaki, Akira, Akira Kimura and Yoshimi Umezaki, 1982. Indirect determination of sub-ng mL-~ levels of phosphorus in waters by di-isobutyl ketone [DIBK] extraction of reduced molybdoantimonylpbosphoric acid and inductively-coupled plasma emission spectrometry. Analytica chim. Acta, 138:121-127. A modified method for the indirect determination of trace levels of P in natural waters involves extracting reduced molybdoantimonylphosphoric acid into organic solvent followed by inductively-coupled plasma emission spectrometry. This sensitive and precise method is simpler than others previously reported because DIBK's low solubility in water eliminates acid-washing of the extract, a step which is time consuming and risks sample loss. Natl. Res. Inst. for Poll. and Resources, Yatabe, Ibaraki 305, Japan. (bwt)
OLR (1982) 29 (12)
82:5993 Persson, J.-A. and Knut lrgum, 1982. Determination of dimethylarsinic acid in seawater in the subPPB range by electrothermal atomic absorption spectrometry after preconcentration on an ionexchange column. Analytica chim. Acta, 138:111119. Dimethylarsinate is first pre-concentrated on cation-exchange resin and separated from interfering components (other arsenicals, group I and II metals). Graphite furnace AAS is used as a sensitive and specific detector. This method can be applied to all natural waters; for a 20 mL sample 'containing a 105-fold excess of inorganic As,' the detection limit is 0.02 ng As/mL. Dept. of Analy. Chem., Univ. of Umea, S-901 87 Umea, Sweden. (bwt)
82:5994 Sperling, K.-R., 1982. Determination of heavy metals in seawater and in marine organisms by flameless atomic absorption spectrophotometry. XV. Matrix effects in graphite tube atomizers and ways to overcome them. Z. analyt. Chem., 311(7):656-664. Biol. Anstalt Helgoland, Labor Sulldorf, Wustland 2, D-2000 Hamburg 55, FRG. 82:5995 Williams, P.J. leB. and N.W. Jenkinson, 1982. A transportable microprocessor-controlled precise Winkler titration suitable for field station and shipboard use. Limnol. Oceanogr., 27(3):576-584. An automatic Winkler titration, based on a photometric end-point detector, is controlled by a system based on an RCA 1800 series microprocessor, takes ~ 3 - 4 min, and in normal use has a coefficient of variation in the range 0.03-0.1%. Dept. of Oceanogr., The Univ., Southampton, SO9 5NH, UK.
C40. Area studies, surveys 82:5996 De Souza, F.P., 1982. Fluoride, bromide and iodide in the Arabian Sea. Indian J. mar. Sci., 11(2):173174. Fluoride concentrations varied from 1.32 m g / L at the surface to 1.37 mg/L at depth with F/C1 of (6.65_+ 0.07) x 10 5. Average bromide was 70 mg/L with Br/C1 of 0.00347. Bromide bore a fairly constant ratio to chlorinity. Concentrations of iodide were small (0.01-0.024 mg/L) with higher concentrations in the surface and bottom layers. Results