extraction methods;
water analysis;
phenols;
nitrophenols;
chlorophenols;
D O I:
10.1016/S0021-9673(96)01090-4
中图分类号:
Q5 [生物化学];
学科分类号:
071010 ;
081704 ;
摘要:
Solid-phase microextraction was investigated for the determination of phenols. Analytes were extracted by a thin layer of suitable sorbent coated on a fine fused-silica fiber. The fiber was then transferred into the injection port of a gas chromatograph, analytes were thermally desorbed and analyzed by gas chromatography. The best results were obtained with a polyacrylate coating by indirectly sampling in the head space above the liquid sample. The extraction period was 60 min, the desorption time was 8 min at 250 degrees C. Acidification by hydrochloric acid (pH similar to 1) and salting out (saturation by sodium chloride) were necessary for the best recovery.