合成了6种对溴偶氨-4-(5-)氯(溴、甲氧基)膦显色剂4-(5-)CPA-pB、4-(5-)BPA-pB、4-(5-)MOPA-pB。考察了这类试剂中含分析功能团(-PO_3H_2)一侧的苯环上助色团的位置和电负性影响显色反应性能的一些规律。助色团(—Cl、—Br、—OCH_3)位于膦酸基间位的 4-CPA-pB、4-BPA-pB、4-MOPA-pB 只与重稀土元素进行β型显色反应,而位于对位的 5-CPA-pB 和5-BPA-pB 可与轻重稀土元素进行β型显色反应,5-MOPA-pB 则可与15个稀土元素迅速进行β型显色反应。其配合物十分稳定,摩尔吸光系数高达1.8×10~5以上。 (5) CPA-pB, 4- (5-) BPA-pB, 4- (5- 5-) MOPA-pB. In this kind of reagent, the positions and the electronegativities of the auxochromes on the benzene ring containing analytic functional group (-PO_3H_2) were investigated. The 4-CPA-pB, 4-BPA-pB, 4-MOPA-pB with the auxochromes (-Cl, -Br, -OCH 3) located at the metaphosphonic sites carry out β-type chromogenic reaction only with heavy rare earth elements, The 5-CPA-pB and 5-BPA-pB in the para-position can react with light and heavy rare earth elements for β-type color reaction, while the 5-MOPA-pB can rapidly undergo β-type color reaction with 15 rare earth elements. The complex is very stable, molar extinction coefficient as high as 1.8 × 10 ~ 5 or more.