石墨炉法测饮用水中铅升温程序优化的研究

Optimization and Choice of Optimization Furnace Program When Determining Pb in Drinking Water by Gfaas

探讨引用水中铅含量石墨炉法测定的升温程序。方法:以磷酸二氢铵为基改剂,利用ApectrAA软件的表面响应向导得出最优化灰化、原子化温度,优化前后对样品进行比较分析。结果:最优化灰化温度为660℃,最优化原子化温度为2080℃;优化前所得的线性相关系数为0.9997,优化后所得的线性相关系数为0.9998。结论:利用SRM向导建立的石墨炉原子吸收法测定饮用水中铅的升温程序,提高了灵敏度,改善了精确度。

OBJECTIVE： A study on an optimum furnace program for GFAAS determination of lead in drinking water. METHODS ： （NH4） H2PO4 was used as mateix modifers, make use of the optimization ash and atomise temperature that which one acquired by the Surfase methodology （SRM） wizard in GFAAS and the furnace program of reference data analysis and compare the sample . RESULT： The specification curve the correlation coefficient of furnace program of GFAAS was better . CONCLSION： The furnace program of GFAAS for determination of lead in drinking water was sensitive and its accuracy was improved.