Improved preparation of small biological samples for mercury analysis using cold vapor atomic absorption spectroscopy.

Abstract:

:Concentrations of mercury in biological samples collected for environmental studies are often less than 0.1 microgram/g. Low mercury concentrations and small organ sizes in many wildlife species (approximately 0.1 g) increase the difficulty of mercury determination at environmentally relevant concentrations. We have developed a digestion technique to extract mercury from small (0.1 g), biological samples at these relevant concentrations. Mean recoveries (+/- standard error) from validation trials of mercury fortified tissue samples using cold vapor atomic absorption spectroscopy for analysis ranged from 102 +/- 4.3% (2.5 micrograms/L, n = 15) to 108 +/- 1.4% (25 micrograms/L, n = 15). Recoveries of inorganic mercury were 99 +/- 5 (n = 19) for quality assurance samples analyzed during environmental evaluations conducted during a 24 month period. This technique can be used to determine total mercury concentrations of 60 ng Hg/g sample. Samples can be analyzed in standard laboratories in a short time, at minimal cost. The technique is versatile and can be used to determine mercury concentrations in several different matrices, limiting the time and expense of method development and validation.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Adair BM,Cobb GP

doi

10.1016/s0045-6535(98)00493-7

subject

Has Abstract

pub_date

1999-05-01 00:00:00

pages

2951-8

issue

12

eissn

0045-6535

issn

1879-1298

pii

S0045653598004937

journal_volume

38

pub_type

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