主次双波长新光度法测水体中的二硝基氯苯

Determination of 2,4 Dinitrochlorobenzene in Environmental Water by Primary Secondary Wavelengths New Spectrophotometry

本文通过对二硝基氯苯与吡啶生成的紫红色化合物光谱的研究，从而导出了主次双波长对二硝基氯苯进行定量测定的数学模型，二硝基氯苯在０～５０μｇ／２５ｍＬ范围内计算参数（Ｙ）与二硝基氯苯浓度（ｘ）呈良好的幂函数关系。由此对环境水体中微量二硝基氯苯进行了测定，方法的最低检出限为０．７μｇ，相对标准偏差ＲＳＤ≤２．７％，加标回收率９９．２％～１０１．０％。

In basic solution,dinitrochlorobenzene may react on pyridine to form a purplish red compound.In this paper with the absorption property of a suspended liquid against light a new analytical method as primary secondary wavelengths spectrophotometry was studied to determine trace dinitrochlorobenzene in environmental water.In 0～50 μg dinitrochlorobenzene/25 mL,the calculation curve is very stable and hardly affected by environment conditions.Experiments for practical waters have shown that the detection limit was 0 7 μg/25 mL dinitrochlorobenzene and RSD≤2 7% and the recovery rate was 99 2% 101 0%.