环境水体中铅的快速测定方法研究

Study on Rapid Determination of Lead in Environmental Water

研究在六次甲基四胺缓冲溶液的介质中,乙醇存在下,铅与甲基百里香酚蓝的快速显色反应体系。显色反应生成一种蓝色络合物,其最大吸收波长为605nm。在优化的实验条件下,铅含量在0—10.0mg·mL-1范围内符合比耳定律,方法检出限为0.2mg·mL-1。对实际样品进行分析,结果令人满意。

In （CH2）6N4 buffer medium,the rapid color reaction of lead（ Ⅱ ） with methyl thymol blue（MTB） in the presence of ethanol forms a blue complex with a maximum absorption wavelength at 605nm. Under the optimal conditions,Beer＇s law is obeyed in the range of 0-10. 0mg · L^-1 for Pb（ Ⅱ ）. The limit of detection is 0. 2 mg · L^-1. The results for the actual samples are satisfactory.