电热原子吸收悬浊液进样法测定煤飞灰中的铅

DETERMINATION OF Pb IN FLYING COAL ASH BY GTAAS

本文利用生物胶作为稳定剂和基体改进剂，把难溶环境固体样品制备成悬浊液，直接进样测定煤飞灰中的铅，得到了准确的结果。找出了日立１８０－８０石墨炉原子吸收光谱仪的最佳线性范围７．０～６６．７ｎｇ／ｍＬ，原子化适宜温度２０００℃，生物胶最佳用量范围０．２～１．２‰，并分析了酸度、搅拌、粒度对测定结果的影响。

Biochemical was chosen as the stability and improvement reagent to make insoluable solid into slurry,which could be sampled directly to determine Pb in flying coal ash,one of the environmental samples.The optimal conditions of Hitichi GTAAS 180 80 were decided by experiments,such as linear range 7 0—66 7ng/mL atomization temperature 2000℃ and amount of biochemical 0 2—1 2‰.The effects of acid,stirring and particle concentration were also addressed.