火焰原子吸收光谱法快速测定豆浆及其原料中的钙  

Fast Determination of Calcium in Soybean Milk and Its Material by Flame Atomic Absorption Spectrometry

作　　者：张丛兰[1] 张美[2] 李皓[1] 杜萍[3,4] 马小建[1] 李庆[1] 杨芳[1] 

机构地区：[1]湖北大学知行学院,湖北武汉430011 [2]武汉工程大学绿色化工过程省部共建教育部重点实验室,湖北武汉430073 [3]昆明理工大学分析测试研究中心,云南昆明650093 [4]云南省分析测试中心,云南昆明650093

出　　处：《食品科学技术学报》2013年第4期23-27,共5页Journal of Food Science and Technology

基　　金：云南省科技条件平台建设计划项目(2010DH025);广东省农业攻关项目(2012B020418003);清远市产学研合作项目(2011D021113007)

摘　　要：用火焰原子吸收光谱法测定豆浆及其原料中的钙.通过单因素实验,优化了样品的稀释比例和消化酸用量.研究了氧化镧溶液对豆浆中钙测定的影响.结果表明,优化的豆浆与水稀释体积比为1∶3;10 mL稀释后豆浆和豆粉样品的消化酸用量分别为30 mL和35 mL;在豆浆加工中,钙的损失率为10.4%;加氧化镧后检测灵敏度达到0.136μg/(mL·%),检出限低至0.01μg/mL,回收率为98.1%.Abstract： The calcium concentrations in soybean milk and its material were determined by flame atomic absorption spectrometry （ FAAS）. The optimal dilution ratio of soybean milk and the amount of digestion acid were discussed by single-factor experiments. Effect of Lanthanum oxide solution on the determination of calcium in soybean milk was also studied. The results showed that the optimizing dilution ratio of soybean milk was 1 ： 3 ; the digestion acid consumption of soybean milk and soybean meal was 30 mL and 35 mL, respectively. The addition of lanthanum oxide resulted in the better sensitivity （0. 136 μg/（mL·% ） ）, lower detection limits（0.01 μg/mL）, and higher recovery（98. 1% ）. The calcium concentration decreased 10.4% in the soybean milk processing.

关 键 词：豆浆 氧化镧 钙 火焰原子吸收光谱法 

分 类 号：TS214.2[轻工技术与工程—粮食、油脂及植物蛋白工程]