主次波长光度法测定天然水中铁  

A PRIMARY-SECONDARY WAVE LENGTH METHOD FOR DETECTION OF IRON IN NATURAL WATER

作　　者：黄文源 王素华 曾照宏 

出　　处：《皖南医学院学报》1997年第3期309-311,共3页Journal of Wannan Medical College

摘　　要：用主次波长法测定天然水中的铁，实验结果表明，当选定主波长λp为510nm，次波长λs为545nm，K＝1时，Fe2+含量在1.25～30．0μg范围，lgy－lgx曲线呈良好的线性关系，相关系数r＝0．9999（n＝6），回归方程式为lgy＝0．8499lgx－0．6066，本法最低检测浓度为0．007mg·L-1，平均回收率为95．9％，三个量水平相对标准偏差分别为2．2％、2．3％和0．3％。A primary-secondary wave length assay was developed to detect iron in natural water. The results suggested that when the primary wave λp, was 510nm, the secondary wave length wasλs 545nm, K=1,and the content of Fe2+ was in a range of 1. 25-30. 0μg. The curve of lgy-lgx wasin a good correlation with a correlation coefficient (R=0. 9999, n=6)and the regresion equation waslgy=0. 8499lgx-0. 6066. The lowest detectable concentration of iron was 0. 007mg/L, with an average recovery rate of 95.9%. The standard deviations of three samples are 2. 2 %, 2.3%, and 0.3% respetively.

关 键 词：天然水 水分析 铁 主次波长光度法 

分 类 号：O661.1[理学—分析化学]