Direct determination of mercury in solid algal cells by direct-current argon-plasma emission spectrometry with sample introduction by electrothermal vaporization |
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| Authors: | Peter G. Mitchell Benjamin Greene Joseph Sneddon |
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| Affiliation: | (1) Department of Chemistry, New Mexico State University, 88003 Las Cruces, NM, USA;(2) Department of Chemistry, California State Polytechnic University, 91768 Pomona, CA, USA;(3) Present address: Department of Cell Biology, Vanderbilt University, 37232 Nashville, TN, USA |
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| Abstract: | A study on the use of electrothermal vaporization for introduction of solid samples into a direct-current plasma is presented. The solid samples investigated were milligram masses of an alga exposed to various mercury solutions. The results are independent of the algal mass in the 0.6–9 mg range, and give acceptable calibration curves up to 20 mg of mercury absorbed on 5-mg masses of the alga; the relative standard deviation was 7.4% for nine successive samples of 100 g of mercury absorbed by a mass of approximately 3 mg of algal cells. Various mercury compounds gave more than one peak, with different appearance times. Addition of sulphur-containing algal cells or cysteine modified the mercury signal, making it the same (for the compounds tested) irrespective of the mercury compound originally present. |
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| Keywords: | algal cells sample introduction mercury direct-current plasma |
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