摘要
骨头汤样品经硝酸消解,以EDTA二钠盐为保护剂,用火焰原子吸收光谱法测定了其中钙的含量。对仪器工作条件作了详述,选择波长422.7nm为测定钙的分析线。方法的检出限(3S/N)为0.004mg.L-1。应用此法测定了猪骨汤中钙的含量,加标回收率为101%(加醋骨汤)和96.0%(未加醋骨汤),相对标准偏差(n=6)小于2%。
Sample of pork bone soup was digested with HNO3, and the content of calcium in the sample solution obtained was determined by FAAS using EDTA disodium salt as protective agent. The working conditions of the instrument were described in detail, and the wavelength of 422. 7 nm was selected as analytical spectral line for the determination of Ca. Value of detection limit （3S/N） of the method was found 0. 004 mg · L^- 1. The proposed method was applied to the determination of calcium in pork bone soul）, giving values of recovery 101% （for sample with addition of vinegar） and 96.0% （for sample without addition of vinegar）. Values of RSD＇s （n= 6） found were less than 2%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2012年第12期1457-1458,1461,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
