This standard solution was accurately prepared in super-clean laboratory with m-nitrophenol and sub-packed in 5ml ampoules.

MEKC method based on on-line sweeping technique was developed for the determination of trace phenol, o-nitrophenol and p-nitrophenol in industrial waste water.

M-chlorocresol or 3-hydroxy-4-chlorophenol on treatment with p-nitrobenzoyl chloride was prepared and conyerted into substituted p-nitrobezyl ketone.