摘要
在溴化十四烷基吡啶存在下,铬天菁S与铍生成三元胶束络合物。在pH10.0氨～氯化铵缓冲介质中,活性炭定量吸附此络合物,用热盐酸洗脱铍,可与其他干扰离子分离,用桑色素荧光法进行测定。该法用于测定美国EPA标准水样和天然水中的痕量铍,结果令人满意。
In the presence of tetradecyl priydine bromide, CAS reacts with Be to form a ternary mi-cellar complex. In the pH 10.0 buffer medium of NH_3·H_2O-NH_4Cl, active carbon adsorbs thecomplex quantitatively. Beryllium is eluted by hot hydrochloric acid to separate with other in-terfering ions, then determined with Morin by fluorescent spectrophotometry. The method is usedfor determination of trace beryllium EPA standard water samples in U. S. and natural waters.The results are satisfactory.
关键词
铍
天然水
活性炭
桑色素
荧光法
Active carbon
fluorescent spectrophotometric
morin
beryllium
