ANALYSIS OF BENZOIC ACID IN THE SOY SAUCE USING NEW TYPE SOLID-PHASE MICROEXTRACTION

摘要

By using home-made solid-phase micro-extraction (SPME) device which is bodily-form, we can quickly enrich the benzoic acid in the simply-disposed spy sauce and analyze the sample on the GC-MS. The extraction can reach equilibrium in four minutes under 20 degree,. Variation coefficient, detection limit and reclaim rate are 1.75%, 0.18mg/L, 97.0%, respectively. Speediness, convenience and sensitivity are the advantages in this method.