A NEW METHOD OF IODINE CATALYTIC COLORIMETRIC DETERMINATION AND ITS APPLICATION IN THE GEOCHEMICAL PROSPECTING FOR HYDROCARBON

The method of iodine catalytic colorimetric determination who takes Fe(SCN)₃-NaNO₂ as a background reaction has high sensitivity(detection limit up to 10^-8),wide linear ranges,and high precision and accuracy.The analysis using this method is simple and rapid,and has obtained good effects in its application to geochemical prospecting for hydrocarbon.