摘要
为确定鲜牛奶氮含量测定的最佳条件,通过Plackett Burman(PB)试验、最陡爬坡试验和响应面优化试验对影响鲜牛奶氮含量测定的5个因素进行统计学筛选和优化。对筛选出的最佳测定条件进行稳定性试验和回收率试验,并与国标法进行比较,结果表明:最佳的测定条件为催化剂8.3 g,消化温度399℃,消化时间230min;较国标法的稳定性和回收率更高,具有实用价值。
To determine the optimum conditions of the nitrogen content in fresh milk with the method of Plackett Burman,Steepest ascent design and response surface and optimized the optimal conditions by the experiment of stability and recovery rate,then compared with the national standard. The results showed that the optimal conditions were as followed: catalyst 8. 3 g,digestion temperature 399 ℃,digestion time 230 mins. The method of determination after optimized is of better stability and recovery rate compared with the national standard method and could be practically used.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2015年第5期177-182,共6页
Food and Fermentation Industries
基金
云南省优势特色重点学科生物学一级学科建设项目(50097505)
关键词
全自动定氮仪
氮含量测定
统计学筛选
响应面
automatic Azotometer
determination of nitrogen content
statistical screening
response surface
fresh milk
