摘要
目的建立微波消解-电感耦合等离子发射光谱(ICP-AES)测定糕粉中滑石粉含量的分析方法。方法分别采用硝酸-双氧水和硝酸-双氧水-氢氟酸2种消解体系对试样进行前处理,加入适量的过饱和硼酸溶液络合过量的氢氟酸,用ICP-AES测定镁的含量。结果镁标准溶液的浓度范围为5.0 mg/L^60.0 mg/L时呈良好的线性关系,线性回归方程为y=813.01x+385.85,相关系数为0.999 8,相对标准偏差为2.23%~7.21%(n=6),回收率为95.5%~105.5%。结论本方法具有试剂消耗量小、耗时短、干扰小、灵敏度高等特点,可应用于糕粉中滑石粉含量的测定,结果令人满意,在实际样品的检测中有广泛的应用前景。
Objective To establish a method for detection the content of the french chalk in cake powder by Microwave Digestion-atomic emission spectrometry. Methods The samples were treated two microwave digestion system of HNO3-H2O2 and HNO3-H2O2-HF,and adding proper amount of boric acid saturated solution complexation excess hydrofluoric acid,content determination of magnesium was detected by ICP-AES. Results Mg2 ＋showed a good linear in the range of 5. 0 mg / L-60. 0 mg / L,linear equation of Mg2 ＋were： y = 813. 01 x ＋ 385. 85,correlation coefficient was 0. 999 8,the relative standard deviation were 2. 23%-7. 21%（ n = 6） and the recoveries were 95. 5%-105. 5%. Conclusion The method is simple,rapid and sensitive. It is applied to the cake powder with satisfactory results. And it will be widely applied in detection of french chalk.
出处
《中国卫生检验杂志》
CAS
2015年第7期969-971,共3页
Chinese Journal of Health Laboratory Technology
关键词
糕粉
滑石粉
过饱和硼酸溶液
微波消解
电感耦合等离子体发射光谱法
Cake power
French chalk
Saturated solution of boric acid
Microwave digestion
Inductively coupled plasma atomic emission spectrometry
