In order to improve the accuracy and efficiency of laboratory data and reduce the experimental error,in this paper,the total nitrogen in soy sauce was determined by graphite digestion furnace and Kjeldahl nitrogen analyzer instead of manual digestion,distillation and titration.The results showed that there was no significant difference between the improved method and the national standard method(P＞0.05).The recovery rate of the improved method was 100.8%～106.2%,and the precision was 0.889%,they are all in accordance with GB/T 27404-2008.The improved method can be popularized and applied in the laboratory.
关键词
酱油/全氮/国家标准法/改进方法
Key words
soy sauce/total nitrogen/national standard method/improvement method
维普
万方数据