火焰原子吸收光谱法测定乳制品中的钙含量  

Determination of Calcium Content in Dairy Products by Flame Atomic Absorption Spectrometry

作　　者：凌云[1] 傅春慧 周晓红[1] 许金伟[1] LING Yun;FU Chunhui;ZHOU Xiaohong;XU Jinwei(College of Food and Health,Zhejiang Vocational and Technical College of Economics and Trade,Hangzhou 310018,China;School of Humanities and Social Sciences,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]浙江经贸职业技术学院食品健康学院,浙江杭州310018 [2]南京林业大学人文社会科学学院,江苏南京210037

出　　处：《食品安全导刊》2024年第35期76-78,82,共4页China Food Safety Magazine

摘　　要：目的:建立火焰原子吸收光谱法测定乳制品中钙含量的方法。方法:钙标准溶液采用1%盐酸配制,乳制品经湿法消解后进行充分赶酸,加入镧盐溶液进行定容,在燃烧器高度为10.0 mm、乙炔流速为1700 mL·min^(-1)、灯电流为2 mA及光谱通带为0.4 nm的条件下进行上机测定,外标法定量。结果:钙含量在0~8.0 mg·L^(-1)线性关系良好,检出限和定量限分别为0.47、1.41 mg·kg^(-1);在3个加标水平下样品的平均回收率为95.9%~106.7%,相对标准偏差在1.8%~2.1%;用该方法进行盲样考核,结果满意。结论:该方法前处理简单、重现性好、回收率高,适用于乳制品中钙含量的测定。Objective:To establish a method for determination of calcium content in dairy products by flame atomic absorption spectrometry.Method:Calcium standard solution was prepared with 1%hydrochloric acid.After wet digestion of dairy products,the acid was fully expelled,and lanthanum salt solution was added for constant volume.The determination was carried out on the machine under the conditions of burner height of 10.0 mm,acetylene flow rate of 1700 mL·min^(-1),lamp current of 2 mA and spectral passband of 0.4 nm.Result:The linear relationship between calcium content in 0 mg·L^(-1)to 8.0 mg·L^(-1)was good,and the limits of detection and quantification were 0.47 mg·kg^(-1)and 1.41 mg·kg^(-1),respectively;the average recoveries were 95.9%to 106.7%and the relative standard deviations were 1.8%to 2.1%;the results of blind sample examination with this method were satisfactory.Conclusion:The method has the advantages of simple pretreatment,good reproducibility and high recovery,and is suitable for the determination of calcium content in dairy products.

关 键 词：火焰原子吸收光谱法 乳制品 钙 

分 类 号：O657.31[理学—分析化学] TS252.7[理学—化学]