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采用差示分光光度法测定头孢氨苄及片剂的含量。方法简便快速，结果准确。平均回收率为９９．５７％，ＲＳＤ为０．７１％。
Determination of cephalexin and tablets using differential spectrophotometry. The method is simple and fast, the result is accurate. The average recovery was 99.57% with a RSD of 0.71%.