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    Preparation and Its Quality Control of Compound Tobramycin Cream
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    Chao Jian, Zhong Huiping, Su Zhao

    Pharmacy of Xinqiao Hospital, Third Military Medicine University, Chongqing 400037, P.R.China

    ABSTRACT Contents of tobramycin and dexamethasone sodium phosphate were measured in compound tobramycin cream by dualwavelength spectrophometry at the same time. Regression equation of tobramycin was: c=242.521A+12.417, r=0.9996; that of dexamethasone sodium phosphate was c=123.999A-16.047, r=0.9991. The mean recovery of both drugs were 99.37% and 100.31%, respectively. RSD of both were 1.40% and 1.18%, respectively. The result showed that this was a method for hospital drug control with several advantages to be simple, rapid, and easy to handle.
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    KEY WORDS Dualwavelength spectrophometry; Tobramycin; Dexamethasone sodium phosphate

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