ANALYSIS OF ANIMAL FOOD PRODUCTS FOR CHLORINATED INSECTICIDE RESIDUES.

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Abstract
The use of ECGC along with proper sample clean-up provides an accurate analytical method for the detection and measurement of trace amounts of chlorinated insecticide residues. Levels of 0.01 ppm of several insecticides may be determined, providing a degree of accuracy comparable to other analytical procedures, if the following precautions are observed: (a) a representative sample is available; (b) the linearity of the instrument is determined for each compound; (c) all reagents are redistilled; (d) only high purity nitrogen is used as the carrier gas; (e) the chromatographic clean-up column is not overloaded with fat; (f) proper elution techniques are followed; (g) the best column packing is used for the insecticides being analyzed; (h) an all glass system is used including a borosilicate glass injector tube and a borosilicate glass column; (i) careful control of temperature and rate of gas flow is performed; and (j) analytical instrument is carefully calibrated with standard insecticide solutions at specified times.

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