Flame atomic absorption spectrometry is the first method in GB 5009.92-2016 National food safety standard-determination of calcium in food. It is confirmed by experiment that the concentration of nitric acid has a negative interference effect on the determination of calcium. When the concentration of nitric acid is less than 2%,the effect increases with the increase of nitric acid concentration,on the contrary,the intensity of blank correction signal of the same calcium ion concentration basically unchanged. Therefore,the sample was pretreated by microwave digestion. The influence of nitric acid concentration on the determination of calcium ions can be effectively eliminated by adjusting the concentration of nitric acid of the samples to be measured ≥ 2%.It can improve the accuracy of the test results and evaluate the calcium content in milk more scientifically.
LI Jiwei, LIU Chuanxu, XING Yijun, JI Kunfa, YANG Aijun, HE Ying
. Effect of Nitric Acid Concentration on Determination of Calcium in Milk by Flame Atomic Absorption Spectrometry[J]. China Dairy, 2022
, 0(8)
: 56
-59
.
DOI: 10.12377/1671-4393.22.08.13
[1] 董德宽,蔡烈麟.牛奶有助于防控人类高血压[J].中国乳业,2014(2):64-66.
[2] 程元元. 补钙对人体健康的重要性及临床常用制剂[J].海峡药学,2007,19(8):120-123.
[3] 刘丽梅.这些习惯,会偷走你体内的钙[J].祝您健康,2018,(3):52-53.
[4] Dugan C E,Fernandez M L.Effects of dairy on metabolic syndrome parameters: a review[J]. The Yale Journal of Biology and Medicine,2014,87(2):135-147.
[5] Zemel M B.Mechanisms of dairy modulation of adiposity[J]. Journal of Nutrition,2003,133(1):252S-256S.
[6] 常建军,其其格,高娃,等.牛奶中钙、钠快速检测方法的研究[J].食品安全质量检测学报,2015,6(3):948-952.
[7] 中华人民共和国国家卫生和计划生育委员会, 国家食品药品监督管理总局. 食品安全国家标准食品中钙的测定: GB5009.92-2016[S]
[8] 孙琦,刘鹭,张书文,等.微波消解-火焰原子吸收光谱法测定牛奶中钙含量[J].食品科学,2012,33(14):162-165.
[9] 吴丹丹,胡文英,范金松.不同酸度对火焰原子吸收分光光度法测钙的影响[J].韶关学院学报,2015,36(8):37-40.
