火焰原子吸收光谱法测定淮河沉积物中的重金属元素

Determination of Heavy Metal Elements in Sediments of Huaihe River by Flame Atomic Absorption Spectrometry

采用盐酸-硝酸-氢氟酸-高氯酸处理沉积物样品,火焰原子吸收光谱法测定其中Pb、Cd、Cu、Cr和Zn5种重金属元素的含量,研究了测定不同元素的仪器最佳工作条件,方法的准确性和精密度。结果表明,该方法的加标回收率为97.69%—102.25%,相对标准偏差为0.14%—3.08%(n=6),测定方法简单易行,结果准确可靠。

Digested with HC1-HNOs-HF-HC104 mixed acid,and the amounts of Pb,Cd,Cu,Cr and Zn in sediments were determined by flame atomic absorption spectrometry. The optimal parameters in FAAS for different element were studied. The recovery of standard addition was 97. 69--102.25% ,and the relative standard deviation（n= 6） was 0.14%-3. 08%. The method is simple,fast and convenient. The results are accurate and reliable.