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研究了吡哌酸与四氯苯醌间的荷移反应．两者在硼砂缓冲溶液中形成１∶１的络合物，其λ_（ｍａｘ）为３３０．８ｎｍ，摩尔吸光系数ε＝１．６６×１０~４，ＲＳＤ为２．２％。用于测定制剂含量，结果与药典方法一致。
The charge transfer reaction between pipemidic acid and chloranil was studied. The two complexes formed a 1: 1 complex in the borax buffer solution with a λ max of 330.8 nm, a molar absorptivity of ε = 1.66 × 10 -4 and RSD of 2.2%. Used to determine the content of the preparation, the result is consistent with the pharmacopoeia.