摘要：Electron capturing detector-gas chromatography was applied to study the behavior of trace amounts of chromium dissolved from a stainless-steel tableware which was examined according to The Standard Methods of Analysis for Hygienic Chemists authorized by the Pharmaceutical Society of Japan. Three kinds of solution were prepared by 1. heating with 4% acetic acid in the tableware to boil for 10 min, 2. standing with 4% acetic acid in the tableware at room temperature for 24 h, 3. standing with 4% acetic acid in the tableware at room temperature for 10 min, by considering the use of each tableware. After the treatments, each test solution was determined by gas chromatography. The present study showed that i) chromium dissolved from tableware was trivalent since gas chromatography detected only the chelate which was formed from trivalent chromium and trifluoroacetylacetone, ii) amounts of chromium dissolved repeatedly from the identical tableware was reduced gradually, iii) relationship between amounts of chromium and iron in test solution obtained from dissolution test was linear (y=19.8×-23.7, r=0.956), and amounts of iron was about 50 to 100 times than that of chromium, iv) it was found that the range of amounts of chromium dissolved was 0.04-29 ng/ml (or 0.09-34 ng/cm2) from the results obtained from various new stainless-steel tablewares and the amounts of chromium dissolved from dissolution test 1, 2, and 3 was in the order 1>2≨3.
