论文部分内容阅读
偶氮氯膦Ⅲ是一种新型显色剂,华东师范大学化学系研制和生产。它的学名叫2,7-双-(4-氯-2-磷酸基苯偶氮)-1,8-二羟基苯-3,6-二磺酸,是铬变酸的衍生物。它和偶氮氯膦Ⅰ一样,在分子结构中具有很强的成盐基(-PO_3H_2)和吸电子基(-Cl),能在酸性介质中与稀土元素形成蓝色1:1络合物,与偶氮肿Ⅲ比较,不仅灵敏度更高,克分子吸收系数从La到Lu为5.5×10~4～8.4×10~4。
Chlorophosphonazo III is a new color developer developed and produced by the Department of Chemistry, East China Normal University. Its scientific name is 2,7-bis- (4-chloro-2-phosphaphenylazo) -1,8-dihydroxybenzene-3,6-disulfonic acid, which is a derivative of chromium acid. Like the chlorophosphonazo Ⅰ, it has a strong salt-forming base (-PO_3H_2) and an electron-withdrawing group (-Cl) in the molecular structure, which can form a blue 1: 1 complex with rare earth elements in acidic medium , Compared with azo swollen Ⅲ, not only the higher the sensitivity, the molecular absorption coefficient from La to Lu is 5.5 × 10 ~ 4 ~ 8.4 × 10 ~ 4.