微波消解-石墨炉法测定缢蛏中的铅

铅的检测方法归纳起来有原子吸收光谱法、电感耦合等离子体原子发射光谱/质谱法、分光光度法等。本文研究了硝酸-双氧水体系对缢蛏样品微波消解石墨炉原子吸收分光光度法测定缢蛏中的铅的方法,基体改进剂为磷酸二氢胺溶液(20g/L),塞曼扣背景,结果表明本方法简便、精密度好、准确性高。方法检测限为0.017mg/kg,实际样品回收率为80.0%~98.0%。精密度和重现性均能满足试验要求。

Determination of Pb in Razor Clam by Furnace Atomic Absopbtion Spectrophotometry

The lead examination methods included the atom to absorb the spectrographic methods,the inductive coupling plasma atomic emission spectrum/mass spectrography,the spectrophotometric method and so on.The method was studied that lead in the sinonovacula constrictalamarck sample which was digested in microwave oven with HN03 and H202 was determined by furnace atomic absorption sectrophotometry,the substrate modifying addition was the phosphoric acid dihydro amine solution（20g/L） and filled the graceful buckle background.The result indicated that this method was simple,with good and high accuracy.The method examination limit was 0.017mg/kg,and the actual sample returns-ratio was 80.0%～98.0%.The accuracy and the reproduction quality can satisfy the experimental request.