M. Vasudevan et al., Simultaneous estimation of phenylpropanolamine HCl, guaiphenesin and diphenylpyraline HCl in syrups by LC, J PHARM B, 24(1), 2000, pp. 25-31
A simple, precise and accurate HPLC method was developed for the simultaneo
us estimation of phenylpropanolamine HCl, guaiphenesin and diphenylpyraline
HCl in syrup. The method was carried out on a Shimpak(R) C-8 column with a
mobile phase consisting of acetonitrile-triethylamine (pH adjusted to 3.5
using orthophosphoric acid; 0.5%), (35.65, v/v) at a flow rate of 1.2 mi mi
n(-1). Detection was carried out at 210 nm. Diphenhydramine was used as int
ernal standard. The validation of the method was also carried out. (C) 2000
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