PURPOSE: A DNA microarray chip having gene group(classifier) which is able to determine harmful chemical groups is provided to determine and monitor the harmful chemicals. CONSTITUTION: A DNA microarray chip for identifying exposure of harmful chemicals of PAHs(poly-cyclic aromatic hydrocarbons), POPs(persistent organic pollutants), or VOCs(volatile organic compounds) contains an oligonucleotide containing entire or partial nucleic acid or complementary oligonucletodie thereof.
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