Redevelopment of Oolong Tea and Green Tea Component Analysis Reference Materials

YANG Rong; GU Tiexin; PAN Hanjiang; LIU Mei; ZHAO Kai

doi:10.15898/j.cnki.11-2131/td.202202180025

Rock and Mineral Analysis > 2023 > 42(2): 420-431. > DOI: 10.15898/j.cnki.11-2131/td.202202180025

YANG Rong, GU Tiexin, PAN Hanjiang, LIU Mei, ZHAO Kai. Redevelopment of Oolong Tea and Green Tea Component Analysis Reference Materials[J]. Rock and Mineral Analysis, 2023, 42(2): 420-431. DOI: 10.15898/j.cnki.11-2131/td.202202180025

Citation:

PDF (1305 KB)

Redevelopment of Oolong Tea and Green Tea Component Analysis Reference Materials

Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences

More Information

Received Date: February 17, 2022
Revised Date: May 15, 2022
Accepted Date: May 22, 2022
Available Online: December 13, 2022

Abstract

HIGHLIGHTS
(1) The certified values are diverse and accurate, meeting the requirements of the national first-class reference materials.

(2) Of two tea reference materials, GBW10016a gave 54 certified values and 3 reference values; GBW10052a gave 57 certified values and 3 reference values.

(3) Compared with the original reference materials, the range of uncertainty is reduced. Eleven elements such as Ag, Sn, Al. Ge, Tl, and Cl have been upgraded from reference values to certified values.

ABSTRACT

BACKGROUND
With the comprehensive development of the agricultural ecological geological survey and the improvement of people's attention to the ecological environment in our country, the demand for biogeochemical reference materials in biological analysis food analysis and agricultural products analysis is increasing. The existing biogeochemical reference materials are in short supply, and there is an urgent need to develop new reference materials. With the full deployment and development of agro-ecological geological surveys, the demand for biogeochemical reference materials is increasing.
OBJECTIVES
To reproduce tea composition reference materials (GBW10016a & GBW10052a) to take the place of old tea composition reference materials (GBW10016 & GBW10052).
METHODS
According to the development needs of geological surveys, the focus of this paper is on the preparation of two tea reference materials, GBW10016a and GBW10052a. The progress includes sampling, processing and preparation, particle size test, uniformity test, stability test, content test, and calculation of identification value and uncertainty.
In the sampling process, the sample collection locations are Wuyishan City, Fujian Province and Wuyuan County, Shangrao City, Jiangxi Province. The candidates are oolong tea and green tea. The tea samples both weigh 400kg.
In the processing and preparation, the samples were cleaned, freeze-dried, heated and dried, ball milled, screened, sub-packed and inactivated. In the particle size test, the BT-9000s laser particle size distributor was used to test the particle size of the samples. The particle size of GBW10016a & GBW10052a centrally distributed in the range of 75μm to 200μm, and the cumulative distribution content reached 98% in the range of 175μm to 200μm.
In the uniformity testing process, 15 bottles of samples were randomly selected for analysis of more than 30 elements. The analysis results show that the relative standard deviation of the elements is less than 7%, the measured values F in the variance test are less than the critical value F. It shows that the uniformity of the samples is acceptable.
In the stability testing process, the short-term and long- term stability of the samples are good according to the analysis and testing in different time periods.
In the content testing process, a total of 61 indicators were analyzed by accurate and reliable methods such as inductively coupled plasma-mass spectrometry/optical emission spectrometry (ICP-MS/OES) and atomic fluorescence spectrometry (AFS) in multiple laboratories.
In the process of calculation of identification value and uncertainty, the Grubbs algorithm and the Dixon algorithm were carried out to check and exclude individual out-group data in the group at the first step. The Cochrane algorithm was used to carry out precision testing at the second step. The Shapiro-Wilk algorithm was used to complete the data normality test.
The whole preparation process of the tea reference materials follow three specifications: Technical Norm of Primary Reference Materials (JJG 1006—1994), General and Statistical Principles for Characterization of Reference Materials (JJF 1343—2012) and The Production of Reference Materials for Geoanalysis(JJF 1646—2017).
RESULTS
GBW10016a (GSB-7a) and GBW10052a (GSB-30a) tea reference materials are successfully reproduced, and have been approved as national first-class reference materials. The GBW10016a (GSB-7a) and GBW10052a (GSB-30a) are characterized by strong representativeness, multi-component planting, and accurate and reliable customization results. A total of 61 indicators are involved in this reproduction: Ag, Al, As, B, Ba, Be, Bi, Br, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Dy, Er, Eu, F, Fe, Gd, Ge, Hf, Hg, Ho, I, K, La, Li, Lu, Mg, Mn, Mo, N, Na, Nb, Nd, Ni, P, Pb, Pr, Rb, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Tb, Th, Ti, Tl, Tm, U, V, Y, Yb, Zn. GBW10016a (GSB-7a) contains 54 elements with certified values and uncertainties, and 3 elements with reference values. GBW10052a (GSB-30a) contains 57 elements with certified values and uncertainties, and 3 elements with reference values. For GBW10016a (GSB-7a), Ag and Sn are added, and Ge and Tl are upgraded from the reference values of the original batch (GBW10016) to the certified values. For GBW10052a, Al, Ag, Cl, I, N, S, Sb, Sc, Si and Sn are upgraded from the reference values of the original batch (GBW10052) to the certified values. Due to the current level of analysis technology and objective conditions, the elements of Hf and Nb cannot be given reference values.
CONCLUSIONS
The reference materials effectively support the needs of geochemical investigation and evaluation of the agricultural ecological environment, analysis of biological samples and food and agricultural products. With the development of ecological environmental research and food safety and hygiene inspection, people pay more and more attention to the characteristic elements, and the requirements are increasing. Problems still exists in the analysis of biological samples, such as discrete analysis results of the same method between laboratories and systematic errors among the main analysis methods of individual elements. There are technical difficulties in the analysis of some elements. Analysis and testing technology needs to be continuously improved to cope with the characteristics of a special biological sample matrix, low composition content and difficult testing.

FullText(HTML)

References (25)

References

[1]	孙德忠, 安子怡, 许春雪, 等. 四种前处理方法对电感耦合等离子体质谱测定植物样品中27种微量元素的影响[J]. 岩矿测试, 2012, 31(6): 961-966. doi: 10.3969/j.issn.0254-5357.2012.06.008 Sun D Z, An Z Y, Xu C X, et al. Effects of four pretreatment methods on determination of 27 trace elements in plant samples by inductively coupled plasma mass spectrometry[J]. Rock and Mineral Analysis, 2012, 31(6): 961-966. doi: 10.3969/j.issn.0254-5357.2012.06.008
[2]	王巧云, 何欣, 王锐. 国内外标准物质发展现状[J]. 化学试剂, 2014(4): 289-296. https://www.cnki.com.cn/Article/CJFDTOTAL-HXSJ201404002.htm Wang Q Y, He X, Wang R. Development of reference materials in China and abroad[J]. Chemical Reagents, 2014(4): 289-296. https://www.cnki.com.cn/Article/CJFDTOTAL-HXSJ201404002.htm
[3]	刘素丽, 王宏伟, 赵梅, 等. 食品中基体标准物质研究进展[J]. 食品安全质量检测学报, 2019, 10(1): 8-13. doi: 10.3969/j.issn.2095-0381.2019.01.002 Liu S L, Wang H W, Zhao M, et al. Research progress of matrix reference materials for food[J]. Journal of Food Safety and Quality, 2019, 10(1): 8-13. doi: 10.3969/j.issn.2095-0381.2019.01.002
[4]	Zhu Y, Narukawa T, Inagaki K, et al. Development of a certified reference material (NMIJ CRM 7505-a) for the determination of trace elements in tea leaves[J]. Analytical Sciences, 2011, 27(11): 1149-1155. doi: 10.2116/analsci.27.1149
[5]	Mori I, Ukachi M, Nagano K, et al. Characterization of NIES CRM No. 23 Tea Leaves Ⅱ for the determination of multielements[J]. Analytical & Bioanalytical Chemistry, 2010(397): 463-470.
[6]	尹明. 我国地质分析测试技术发展现状及趋势[J]. 岩矿测试, 2009, 28(1): 37-52. doi: 10.3969/j.issn.0254-5357.2009.01.009 Yin M. Development status and trend of geological analysis and testing technology in China[J]. Rock and Mineral Analysis, 2009, 28(1): 37-52. doi: 10.3969/j.issn.0254-5357.2009.01.009
[7]	卢晓华, 纪洁. 我国食品分析用标准物质现状分析[J]. 中国计量, 2007(4): 78-79. doi: 10.3969/j.issn.1006-9364.2007.04.043 Lu X H, Ji J. Analysis on the status quo of reference substances for food analysis in my country[J]. China Metrology, 2007(4): 78-79. doi: 10.3969/j.issn.1006-9364.2007.04.043
[8]	邵鸿飞, 冀克俭, 刘元俊, 等. 环境标准物质的应用及其发展中存在的问题[J]. 化学分析计量, 2008(3): 68-69. doi: 10.3969/j.issn.1008-6145.2008.03.024 Shao H F, Ji K J, Liu Y J, et al. Application of environmental standard substances and problems existing in its development[J]. Chemical Analysis Metrology, 2008(3): 68-69. doi: 10.3969/j.issn.1008-6145.2008.03.024
[9]	谢学锦, 任天祥, 奚小环, 等. 中国区域化探全国扫面计划卅年[J]. 地球学报, 2009, 30(6): 700-716. doi: 10.3321/j.issn:1006-3021.2009.06.003 Xie X J, Ren T X, Xi X H, et al. The implementation of the Regional Geochemistry-National Recon-Naissance Program (RGNR) in China in the past thirty years[J]. Acta Geoscientica Sinica, 2009, 30(6): 700-716. doi: 10.3321/j.issn:1006-3021.2009.06.003
[10]	孙威江, 危赛明. 中国无公害茶叶发展的现状与趋势[J]. 中国茶叶, 2001(5): 24-25. doi: 10.3969/j.issn.1000-3150.2001.05.012 Sun W J, Wei S M. Current situation and trend of China's pollution-free tea development[J]. Chinese Tea, 2001(5): 24-25. doi: 10.3969/j.issn.1000-3150.2001.05.012
[11]	王毅民, 王晓红, 高玉淑. 地质标准物质粒度测量与表征的现代方法[J]. 地质通报, 2009, 28(1): 137-145. doi: 10.3969/j.issn.1671-2552.2009.01.017 Wang W M, Wang X H, Gao Y S, et al. Modern methods for particle size measurement and characterization of geological reference materials[J]. Geological Bulletin of China, 2009, 28(1): 137-145. doi: 10.3969/j.issn.1671-2552.2009.01.017
[12]	杨珍娥, 苏健, 孙乐雨, 等. 关于激光粒度仪和标准筛分试验的对比研究[J]. 煤炭加工与综合利用, 2017(S1): 62-64, 80. https://www.cnki.com.cn/Article/CJFDTOTAL-MTJG2017S1017.htm Yang Z E, Su J, Sun L Y, et al. Comparative study on laser particle size analyzer and standard screening test[J]. Coal Processing and Comprehensive Utilization, 2017(S1): 62-64. https://www.cnki.com.cn/Article/CJFDTOTAL-MTJG2017S1017.htm
[13]	邵鸿飞, 柴娟, 黄辉. 粒度分析及粒度标准物质研究进展[J]. 化学分析计量, 2012, 21(2): 99-101. doi: 10.3969/j.issn.1008-6145.2012.02.031 Shao H F, Chai J, Huang H. Research progress of particle size analysis and particle size reference materials[J]. Chemical Analysis and Metrology, 2012, 21(2): 99-101. doi: 10.3969/j.issn.1008-6145.2012.02.031
[14]	王晓红, 王毅民, 高玉淑, 等. 地质标准物质均匀性检验方法评介与探讨[J]. 岩矿测试, 2010, 29(6): 735-741. doi: 10.3969/j.issn.0254-5357.2010.06.023 Wang X H, Wang Y M, Gao Y S, et al. Review and discussion on the homogeneity test method of geological reference material[J]. Rock and Mineral Analysis, 2010, 29(6): 735-741. doi: 10.3969/j.issn.0254-5357.2010.06.023
[15]	雷霆, 赵士英. 食品标准物质的均匀性检验[J]. 科研与设计, 1992(1): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKJ199201014.htm Lei T, Zhao S Y. Homogeneity inspection of food standard materials[J]. Research and Design, 1992(1): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-SYKJ199201014.htm
[16]	关铁权. 标准物质均匀性可靠性的探讨[J]. 计量与测试技术, 1994(6): 23-26. https://www.cnki.com.cn/Article/CJFDTOTAL-JLYS406.013.htm Guan T Q. Discussion on reliability of standard material homogeneity[J]. Metrology and Testing Technology, 1994(6): 23-26. https://www.cnki.com.cn/Article/CJFDTOTAL-JLYS406.013.htm
[17]	赵海, 李灵凤. 电热板酸溶-电感耦合等离子体原子发射光谱法同时测定地质样品中的硼、砷、硫[J]. 中国资源综合利用, 2020, 38(8): 19-21. https://www.cnki.com.cn/Article/CJFDTOTAL-ZWZS202008006.htm Zhao H, Li L F. Simultaneous determination of boron, arsenic and sulfur in geological samples by hot plate acid-soluble-inductively coupled plasma atomic emission spectrometry[J]. Comprehensive Utilization of Resources in China, 2020, 38(8): 19-21. https://www.cnki.com.cn/Article/CJFDTOTAL-ZWZS202008006.htm
[18]	但德忠, 冷庚, 皇甫鑫. 环境样品分析[J]. 分析试验室, 2010, 29(7): 79-122. https://www.cnki.com.cn/Article/CJFDTOTAL-FXSY201007025.htm Dan D Z, Leng G, Huang F X. Environmental sample analysis[J]. Chinese Journal of Analysis Laboratory, 2010, 29(7): 79-122. https://www.cnki.com.cn/Article/CJFDTOTAL-FXSY201007025.htm
[19]	罗立强, 吴晓军. 现代地质与地球化学分析研究进展[M]. 北京: 地质出版社, 2014: 417. Luo L Q, Wu X J. Advances in geoanalysis[M]. Beijing: Geological Publishing House, 2014: 417.
[20]	习小山. 浅析岩矿分析与测试技术在当前阶段的应用与发展趋势[J]. 中国新技术新产品, 2016(21): 174-175. https://www.cnki.com.cn/Article/CJFDTOTAL-XPJX201621122.htm Xi X S. The application and development trend of rock mine analysis and testing technology in the current stage[J]. New Technology & New Products of China, 2016(21): 174-175. https://www.cnki.com.cn/Article/CJFDTOTAL-XPJX201621122.htm
[21]	汪艳芸, 邓晃. 岩矿分析技术发展方向及其在实物地质资料中的应用浅析[J]. 中国矿业, 2017(2): 374-376. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA2017S2088.htm Wang Y Y, Deng H. The development direction of rock and mineral analysis technology and its application in physical geological data[J]. China Mining, 2017(2): 374-376. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA2017S2088.htm
[22]	冯永明, 邢应香, 刘洪青, 等. 微波消解-电感耦合等离子体质谱法测定生物样品中微量硒的方法研究[J]. 岩矿测试, 2014, 33(1): 34-39. http://www.ykcs.ac.cn/cn/article/id/00a7dfe7-2a17-45e5-ada2-503f476cc501 Feng Y M, Xing Y X, Liu H Q, et al. Determination of trace selenium in biological samples by microwave digestion-inductively coupled plasma mass spectrometry[J]. Rock and Mineral Analysis, 2014, 33(1): 34-39. http://www.ykcs.ac.cn/cn/article/id/00a7dfe7-2a17-45e5-ada2-503f476cc501
[23]	刘文政, 贾亚琪, 李磊. 微波消解-电感耦合等离子体质谱法同时测定茶叶中的10种金属元素[J]. 微量元素与健康研究, 2020(27): 50-53. https://www.cnki.com.cn/Article/CJFDTOTAL-WYJK202001025.htm Liu W Z, Jia Y Q, Li L. Simultaneous determination of 10 metal elements in tea by microwave digestion-inductively coupled plasma mass spectrometry[J]. Study on Trace Elements and Health, 2020(27): 50-53. https://www.cnki.com.cn/Article/CJFDTOTAL-WYJK202001025.htm
[24]	张丽华, 肖国平, 宋游, 等. 微波技术在生物样品预处理中的应用[J]. 现代科学仪器, 2004(5): 37-40. https://www.cnki.com.cn/Article/CJFDTOTAL-XDYQ200405009.htm Zhang L H, Xiao G P, Song Y, et al. Application of microwave technology in biological sample pretreatment[J]. Modern Scientific Instruments, 2004(5): 37-40. https://www.cnki.com.cn/Article/CJFDTOTAL-XDYQ200405009.htm
[25]	全浩, 韩永志. 标准物质及其应用技术(第二版)[M]. 北京: 中国标准出版社, 2003: 225-230. Quan H, Han Y Z. Reference materials and their applied technology (The 2nd Edition)[M]. Beijing: China Standard Publishing House, 2003: 225-230.

Supplements (0)

Cited By

Cited by

Periodical cited type(9)

1.	李光一，马景治，李策，汪岸，贾正勋，董学林. 电弧分馏富集-发射光谱法测定含铌钽矿石中铌钽. 冶金分析. 2025(02): 49-55 .
2.	兰明国，李飞，陈贵仁，何袖辉，郭家泽，石友昌. 交流电弧光电直读发射光谱法测定有机土壤中银锡硼. 冶金分析. 2024(09): 45-52 .
3.	王冠，董俊，徐国栋，胡志中. 偏硼酸锂熔融-电感耦合等离子体发射光谱法结合扫描电镜-能谱测定锡矿石中锡钨锌铜铁锰. 岩矿测试. 2023(01): 114-124 . 本站查看
4.	黄海波，袁静，凌波，白晓，李民敬，刘建坤. 电弧发射光谱技术发展及其在地质领域的应用. 华东地质. 2023(01): 103-117 .
5.	蒿艳飞，陈璐，辜洋建，李云龙，毕建玲，高玉花. 石墨消解-电感耦合等离子体光谱法测定土壤中全硼. 化学分析计量. 2023(06): 57-60 .
6.	肖细炼，刘杰，魏立，陈燕波，杨小丽，杨红梅. 微波消解—电感耦合等离子体发射光谱法同时测定生物样品中12种元素的方法. 物探与化探. 2023(03): 739-746 .
7.	刘向磊，孙文军，文田耀，王腾飞，王凯凯，刘宗超. 地质样品中贵金属分析方法现状及展望. 冶金分析. 2022(12): 23-35 .
8.	马景治，曲少鹏，李光一，董学兵，吴萌，吴俊，李策，董学林. 固体进样-发射光谱法同时测定地球化学样品中铜铅锌镍. 岩矿测试. 2022(06): 1007-1016 . 本站查看
9.	祁雨凡. 交流电弧原子发射光谱测定地质样品中银、硼、锡效果研究. 世界有色金属. 2021(21): 123-124 .

Other cited types(0)

Get Citation

PDF

XML

Article views (188) PDF downloads (38) Cited by(9)

Turn off MathJax

Article Contents

ABSTRACT

References

Redevelopment of Oolong Tea and Green Tea Component Analysis Reference Materials

ABSTRACT

References

Cited by

Periodical cited type(9)

Other cited types(0)

Catalog

Export File

Citation

Format

Content