By Anonymous on Monday, April 22, 2002 - 06:05 am:
CURRENTLY I AM TRYING TO DEVELOP METHOD OF ANALYSIS FOR THE CHLOROPHENARAMINE HCL, DEXTROMETHORPHAN HBR , PSEUDOEPHERINE HCL ,AND PARACETAMOL , BENZOIC ACID , I WANT TOELUTE ALL THIS IN A SINGLE RUN
I TRIED WITH C18 25CM COLUMN WIHT 1.0 ML FLOWRATE WITH ION PAIR OCATANSULPHONIC ACID)0.1%PH 2.5WITH PHOSPHORIC ACID IN RATIO (95%AND 5%METHANOL) EVEN THOUGH MY CPM PEAK IS COMING AT 1.9 MINUTES I WANT TO RETAIN THIS NOW WHAT TO DO
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