PALLADIUM NITRATE MAGNESIUM-NITRATE MODIFIER FOR ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY .3. DETERMINATION OF MERCURY IN ENVIRONMENTAL STANDARD REFERENCE MATERIALS

被引：54
作者：
WELZ, B
SCHLEMMER, G
MUDAKAVI, JR
机构：
来源：
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 1992年 / 7卷 / 03期
关键词：
ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; PALLADIUM MODIFIER; MERCURY DETERMINATION; SODIUM CHLORIDE INTERFERENCE; ENVIRONMENTAL SAMPLES;
D O I：
10.1039/ja9920700499
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A single addition of 15-mu-g of palladium is sufficient for 40-60 determinations of mercury if the graphite tube is not heated to temperatures higher than 1500-degrees-C in the cleaning step. A pyrolysis temperature of 400-degrees-C can be used without any loss of mercury, and a characteristic mass of 0.1 ng of mercury was obtained for an atomization temperature of 1000-degrees-C. Interferences caused by high sodium chloride concentrations could be eliminated by using a mixture of 95% argon and 5% hydrogen as the purge gas. Mercury could be determined accurately in Aquatic Plant, Albacore Tuna, River Sediment and Coal Fly Ash reference materials.
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页码：499 / 503
页数：5
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