双波长分光光度法测定自来水中Fe^(2+)和Fe^(3+)的含量

Determination of Fe^(2+) and Fe^(3+) by Dual-wavelength Spectrophotometry

采用双波长分光光度法测定 Fe2 +和 Fe3+的方法 ,结果表明 ,在 λ1 =4 0 0 nm,λ2 =5 4 2 nm处 ,显色时间在 6 0 min～ 80 min,p H =4～ 5时能联合测定水中 Fe2 + 和 Fe3+ ,其结果具有较高的精密度和准确度。

The content of Fe 2 and Fe 3 was measured using dual-wavelength spectrophotometry.It was found that Fe 2 and Fe 3 could be determined simultaneously at 400nm and 542nm,with color time 60 min～80 min,pH=4～5 with high accurate and precision.