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在pH4．0Britton－Robinson缓冲溶液中，头孢氨苄在紫外光照射下生成具有电活性的产物，其峰电位为—0·80V（vs．SCE）．据此建立了一个检出限和测定范围分别为0．02mg／L和0．05～3．0mg／L，头孢氨苄的光化学伏安分析法，并用于溶菌酶-头饱氨苄复合物中头孢氨苄的测定，结果满意．
In pH4.0Britton-Robinson buffer solution, cefalexin produced an electroactive product under ultraviolet light irradiation with a peak potential of -0.80V (vs.SCE). Thus, a limit of detection and determination of the range of 0.02mg / L and 0.05 ~ 3.0mg / L, cephalexin photochemical voltammetric analysis, and for the lysozyme - cefotaxime conjugate cephalosporin Ampicillin determination, the results are satisfactory.