Qualitative analysis for residues of biphenyl, orthophenylphenol and sodium orthophenylphenate in citrus fruit peel. ... Apparatus. mixer
250 ml flask with ground glass joint and with a cooled reflux condenser reduced pressure evaporator micropipettes thin layer chromatographic apparatus with plates measuring 20 X 20 cm
U.V. lamp (254 nm): the intensity should be such that a spot of 5 åg of biphenyl is visible equipment for pulverising reagents oven ...
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