Acta Metrologica Sinica  2019, Vol. 40 Issue (6): 1129-1134    DOI: 10.3969/j.issn.1000-1158.2019.06.31
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Determination of Chlorine in Bovine Liver Reference Material
FU Chuan1,SHI Nai-jie2,FENG Liu-xing2,CAI Ye-qiang1,WANG Hai-feng2
1. Jiangsu Institute of Metrology, Nanjing, Jiangsu 210000, China
2. National Institute of Metrology, Beijing 100029, China
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Abstract  The determination of chlorine in matrix reference material is difficult. The content of chlorine in reference material of bovine liver was determined by ion chromatography combined with pyrohydrolysis and potentiometric titration following dry ashing digestion. The pretreatment and determination conditions of the two methods were optimized, the experimental results show that the results of the two methods are consistent,the relative standard deviations of the measurement results are 0.7% and 1.1% respectively. The two methods were verified by using NIST bovine liver reference material (SRM1577c), the results of the two methods are consistent with the standard values. The uncertainties of the determination results of the two methods were evaluated, and the relative expanded uncertainties of the chlorine determination results (k=2) are 1.6% and 2.2% respectively. Both methods used to determine the chlorine content in bovine liver are accurate and reliable, and can meet the requirements of reference material certification.
Key wordsmetrology      bovine liver reference material      chlorine      ion chromatography      potentiometric titration      hydrolysis      dry ashing digestion      certification of reference material     
Received: 23 May 2018      Published: 10 October 2019
PACS:  TB99  
Corresponding Authors: chuan fu     E-mail: 704556701@qq.com
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FU Chuan
SHI Nai-jie
FENG Liu-xing
CAI Ye-qiang
WANG Hai-feng
Cite this article:   
FU Chuan,SHI Nai-jie,FENG Liu-xing, et al. Determination of Chlorine in Bovine Liver Reference Material[J]. Acta Metrologica Sinica, 2019, 40(6): 1129-1134.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.06.31     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I6/1129
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