我们实验发现在阳离子表面活性剂CTMAB存在下用2,7-二羟基萤光黄分光光度测定钼不但有高的灵敏度(ε=1.33×10~5),而且与文献比较具有酸度范围宽(0.1—0.8N盐酸),显色酸度高,干扰离子相对少,试剂吸收受酸度影响小,重现性好等优点。三羟基萤光酮类是分光光度测定钼有较高灵敏度的显色剂,但受高价离子干扰严重,故必须掩蔽,尽管如此,钛、钨等的干扰仍难以消除,有用两等份试液的空白褪色法 Our experiments showed that molybdenum not only has high sensitivity (ε = 1.33 × 10 ~ 5), but also has a wide range of acidity (0.1) as compared with the literature in the presence of cationic surfactant CTMAB -0.8N hydrochloric acid), high color acidity, relatively few interfering ions, reagent absorption by the acidity of small, good reproducibility and so on. Trihydroxyfluorone is a spectrophotometric determination of molybdenum has a higher sensitivity of the developer, but by the high price of ion interference serious, it must be masked, nevertheless, titanium, tungsten and other interference is still difficult to eliminate, useful two aliquots of test solution Blank fading method