罐装鱼挥发性盐基氮定量测定能力验证结果与分析

Capabilityverification results and analysis of quantitative determination of total volatile basic nitrogen in canned fish

中文关键词:  罐装鱼  挥发性盐基氮  FAPAS能力验证

英文关键词:canned fish  total volatile basic nitrogen  FAPAS ability verification

中文摘要:

      目的 通过食品分析水平评估计划(food analysis performance assessment scheme, FAPAS)能力验证, 提高实验室理化分析检测能力。方法 采用国标中半微量定氮法、自动凯氏定氮仪法对鱼罐头中挥发性盐基氮(total volatile base nitrogen, TVB-N)测定进行方法比对, 结合FAPAS能力验证报告对检测方法进行评价。 结果 通过对鱼罐头中挥发性盐基氮的测定, 2种方法的检测数据均能满足实验室质量控制规范, 自动凯氏定氮法的精密度、准确度、操作便利性都高于半微量定氮法, FAPAS样品的TVB-N测定结果为32.4 mg/100 g, │Z│值为1.1。结论 实验检测能力评价为满意, 表明本实验室对食品中TVB-N项目检测能力较好。

英文摘要:

      Objective To improve the laboratory physical and chemical analysis anddetection ability by FAPAS (food analysis performance assessment scheme)ability verification. Methods The semi micro determination method of nitrogen in national standard and automatic Kjeldahl nitrogen analyzer were used to determine the total volatile basic nitrogen(TVB-N) in canned fish. The test method was evaluated with FAPAS capacity verification report. Results Through the determination of volatile basic nitrogen in canned fish, the detection data of both methods could meet the criterion on quality control of laboratories. The precision, accuracyand operation convenience of automatic Kjeldahl method were higher than those of semi micro method. The TVB-N of FAPAS was 32.4 mg/100 g, and the value of │Z│was 1.1. Conclusion The evaluation of the experimental detection ability is satisfactory, which indicates that our laboratory has good detection ability for TVB-N project in food.