【摘要】 孔雀绿-磷钼杂多酸分光光度法检测水中微量磷效果比较好,但在磷质量浓度为1-10μg/L内的检测效果不够理想,为此,从标准曲线样液点浓度、最大吸光度的波长、显色剂的配制、孔雀绿的溶解过程以及表面活性剂的用量等方面对这一方法进行改进.结果表明,采用改进后的孔雀绿-磷钼杂多酸分光光度法测定磷质量浓度为0-50μg/L水样,灵敏度高、精密度好、络合物稳定时间长,尤其在磷质量浓度为1-10μg/L内与原方法相比优势更明显,适合饮用水中痕量磷的检测.更多还原

【Abstract】 PMA-Malachite Green Spectrophotometry plays a role in measuring micro-amount phosphorus,but in the concentration of phosphorus range from 1 to10 μg/L,the effect is not fairly good.This paper presents a revised measurement through some aspects such as adjusting the concentration of samples’ type curve,optimizing the developer compounds,reviewing the effect of different solution course of malachite green and different doses of surfactant to the measurement and re-measuring the wavelength of maximal absorbance of associated system.The results indicate that the revised measurement of PMA-Malachite Green Spectrophotometry is good at measuring trace amount phosphorus concentration range from 0 to 50 μg/L,which has qualities of high degree of sensitivity and precision and of long stably time.Especially,the advantage of revised measurement is evident in concentration range from 1 to 10 μg/L,which is equal to measure the trace amount phosphorus in potable water.更多还原