Preparation of Reference Materials GBW10010a for Rice Component and Data Characteristics

YANG Rong; GU Tie-xin; PAN Han-jiang; LIU Mei; ZHOU Guo-hua

doi:10.15898/j.cnki.11-2131/td.202005210073

Rock and Mineral Analysis > 2020 > 39(6): 866-877. > DOI: 10.15898/j.cnki.11-2131/td.202005210073

YANG Rong, GU Tie-xin, PAN Han-jiang, LIU Mei, ZHOU Guo-hua. Preparation of Reference Materials GBW10010a for Rice Component and Data Characteristics[J]. Rock and Mineral Analysis, 2020, 39(6): 866-877. DOI: 10.15898/j.cnki.11-2131/td.202005210073

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Preparation of Reference Materials GBW10010a for Rice Component and Data Characteristics

Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Science, Langfang 065000, China

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Received Date: April 08, 2020
Revised Date: August 02, 2020
Accepted Date: September 18, 2020
Published Date: October 31, 2020

Abstract

HIGHLIGHTS
(1) A rice certified reference material GBW10010a was developed. A total of 54 elements have been certificated which included 39 elements with certified values and uncertainties and 15 elements with reference values.

(2) The uncertainty of a certificated value integrated the uncertainties caused by homogeneity, stability and values.

(3) Compared with GBW10010, GBW10010a has much more certified value indicators and higher accuracy. The total number of certified value elements has increased by 7 items, and the uncertainty of each element has been wholly reduced.

ABSTRACT

BACKGROUNDWith the increased attention paid for the construction of ecological civilization, a comprehensive survey of natural resources is imperative, and new requirements for biological reference materials have also been put forward. At present, relevant research work has been widely carried out. The comprehensive investigation of natural resources, agricultural products and food safety evaluation all need to accurately test the element composition of biological samples, and biological reference materials are needed as the basis for the comparison and traceability of biological components. The demand for biological matrix reference materials has increased significantly. As one of the main foods, the food safety of rice has been paid more and more attention. It is of great practical significance to carry out accurate analysis of the chemical components in rice. Therefore, the demand for rice is particularly prominent, but the rice reference materials for composition analysis are still lacking.
OBJECTIVESTo develop rice certified reference material (GBW10010a) and compare it with the data characteristics of GBW10010.
METHODSThe rice certified reference material (GBW10010a) was prepared in strict accordance with relevant specifications. The collected candidates were prepared through coarse crushing, drying, fine crushing, sieving, blending and other steps. The particle size distribution was detected by BT-9000ST laser particle size analyzer. 15 bottle samples were randomly selected and homogeneity testing was carried out by ICP-MS and ICP-OES, etc. The data were statistically calculated by one-way ANOVA, indicating good homogeneity of the samples. The long-term stability of the standard material under the specified storage conditions was investigated. The linear model was used to evaluate the stability of the sample. The determination of 60 components was carried out by means of ICP-MS, ICP-OES, AFS, COL, VOL, XRF, IC and other Analytical test methods.
RESULTSThe rice reference material prepared in this research has diverse fixed value components, accurate and reliable measurement values, and meet the requirements of national first-level reference material. GBW10010a has a total of 54 main trace elements. 39 elements have certified values and uncertainties and 15 elements only have reference values. The content of heavy metal elements such as As, Cd, Co, Cr, Cu, Hg, Mn, Mo, Ni, Zn in GBW10010a decreased significantly, among which Cd, Cu, and Zn decreased by about 39%, 43% and 38.7%, respectively.
CONCLUSIONSTo a certain extent, the values reflects the improvement of farmland ecological environment. Compared with the original GBW10010, the total number of certified value elements has increased by 6 items, including Ag and Nb (Nb gives reference values). Moreover, the uncertainty of each element is reduced, including biological-related elements Al, Cd, Cu, Fe, K, Mg, Mo, Na, P, Pb, Se, and Zn. The reduction indicates the technological advancement of the geological analysis and the improvement of the certified value level. In addition, the content of heavy metal elements in GBW10010a decreased significantly, reflecting the improvement of farmland ecological environment. The designated elements of the reference materials cover most of the main and trace elements with biological effects, and are suitable for the calibration of analytical instruments, evaluation of analytical methods, and monitoring analytical quality during agricultural ecological environment geochemical surveys and evaluation, biological sample analysis, agricultural product quality and food safety evaluation.
- certified reference material,
- rice,
- remanufacturing,
- homogeneity test,
- stability test,
- certified value element,
- quality monitoring

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References (30)

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