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Answer Posted / suresh
PDA MEANS PHOTO DIODE ARRY DEYECTOR.ITS ALSO WORK LIKE UV
DETECTOR,TO FIND OUT THE RETENTION TIME OF ANALYTE PEAK AT
MULTIPLE WAVE LENTH.EX CAFEEN ITS SHOWS MAXIMUM ABSORBANCE
IN 203-207NM,276-281, AND MINIMUM ABSORBANCE 243-247 NM
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