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- W1970031300 abstract "A simple, sensitive and very selective spectrophotometric method for the determination of diclofenac sodium (DS) in pharmaceutical preparations is described based on the fixation of the DS on Sephadex QAE A-25 resin at pH 7.0 and direct measurement of the absorbance of the solid phase at 281 and 400 nm. The calibration graph was linear from 0.40–5.75 μg ml−1 of DS and the detection limit (calculated from K=3 criterion) was 0.086 μg ml−1. The RSD (n=10) was 1.05% for the determination of 3.80 μg ml−1 of DS. The method was applied to authentic pharmaceutical preparations. Other active ingredients, e.g., 50-fold thiamine chlorhydrate, 40-fold methylcobalamine, 20-fold pyridoxine and 5-fold paracetamol as well as excipients, did not interfere." @default.
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- W1970031300 date "1998-08-01" @default.
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- W1970031300 title "Sensitive and selective determination of diclofenac sodium in pharmaceutical preparations by solid phase ultraviolet absorptiometry" @default.
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- W1970031300 doi "https://doi.org/10.1016/s0003-2670(98)00249-9" @default.
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