A detailed study of thermal decomposition, amalgamation/ atomic absorption spectrophotometry methodology for the quantitative analysis of mercury in fish and hair.

摘要: The analytical method for determining the concentration of mercury in fish by thermal decomposition, amalgamation/ atomic absorption spectrophotometry was thoroughly studied. Specific issues addressed were accurate modeling instrumental response, use quartz and nickel boats, carryover effects, software limitations, troubleshooting. DMA-80 Direct Mercury Analyzer instrument calibrated using a total 22 points, resultant curves statistically analyzed. At minimum, second-order polynomials required to adequately model data. TORT-2 standard reference material analyzed both boats found give equivalent performance types vessels well within 95% confidence interval. DOLT-3 also yielded values interval, but DORM-2 did not. Carryover effects be minimal with new catalyst tube increased age. Blanks should run after analysis high content samples; however, when has aged, two blanks are reduce apparent signals nominal blank values. Comparable results between amalgamation/atomic cold-vapor demonstrated. feasibility this analyze hair explored suitable. Software problems limitations have been noted attempting implement high-throughput methodology. Instrumental drift operated over long periods. Blank can provide important diagnostic indicators.