火焰原子吸收光谱法检测牛奶中钙方法的研究
Research on the Method of Detecting Milk Calcium by Flame Atomic Absorption Spectrometry
王英南 1卢智华 1李艳红 1伊德润 2毕成名 1何青春 1李慧 2王斌 1白晓玲2
作者信息
- 1. 蒙牛乳业(唐山)有限责任公司,河北唐山 064000
- 2. 中国蒙牛乳业有限公司,内蒙古呼和浩特 011500
- 折叠
摘要
准确检测牛奶中钙含量,进一步探究国标方法中干灰化法.[方法]通过单因素和正交试验,以牛奶中钙加标回收率为指标优化其检测方法,验证和应用该方法.试验结果表明镧溶液添加量2.5 mL,(1+1)硝酸溶液添加量5 mL,(180℃加热5 min、230℃加热5 min、300℃加热5 min、400℃加热10 min、500℃加热20 min)逐步升温炭化,550℃灰化4 h为最佳检测条件,可以保证检测结果的准确性.
Abstract
Calcium content is an important indicator of milk.To accurately detect the calcium content in liquid milk,and further explore the dry ashing method in the national standard method.By conducting single factor and orthogonal experiments,the detection method was optimized using the spiked recovery rate as the indicator and validate and apply the method.The experimental results showed that:The amount of lanthanum solution added was 2.5 mL,nitric acid solution was 5 mL(1+1),(Heating at 180℃for 5 min 230℃for 5 min,300℃for 5 min,400℃for 10 min,500℃for 20 min)gradually increase temperature and carbonize,ashing at 550℃for 4 h was the optimal detection condition,the accuracy of the test results can be guaranteed.
关键词
火焰原子吸收/干灰化法/牛奶/钙Key words
flame atomic absorption/dry ashing method/milk/calcium引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据