Standard materials for soil composition analysis

Geochemical reference materials are reference standards for testing the chemical composition values of various geological materials. Mainly used for the transmission of measurement values, calibration of testing instruments, monitoring of analytical quality, evaluation of analytical methods, and laboratory certification. The geochemical reference materials play an important role in the quality control of geochemical sample analysis. Standard substances have become the basis for arbitration and evaluation of various material composition testing in economic and trade.

sampling site

Basin background

GBW07401 (GSS-1) Soil Composition Analysis Standard Material - Dark Brown Soil 70g/bottle
GBW07402 (GSS-2) Soil Composition Analysis Standard Material - Chestnut Soil 70g/Bottle
GBW07403 (GSS-3) Soil Composition Analysis Standard Material - Yellow Brown Soil 70g/bottle
GBW07404 (GSS-4) Soil Composition Analysis Standard Material - Limestone Soil 70g/Bottle
GBW07405 (GSS-5) Soil Composition Analysis Standard Material - Yellow Red Soil 70g/bottle
GBW07406 (GSS-6) Soil Composition Analysis Standard Material - Yellow Red Soil 70g/bottle
GBW07407 (GSS-7) Soil Composition Analysis Standard Material - Brick Red Soil 70g/bottle
GBW07408 (GSS-8) Soil Composition Analysis Standard Material - Loess 70g/bottle
GBW07423 (GSS-9) Soil Composition Analysis Standard Material - Lake Sediments 70g/bottle
GBW07424 (GSS-10) Soil Composition Analysis Standard Material - Songnen Plain Soil 70g/bottle
GBW07425 (GSS-11) Soil Composition Analysis Standard Material - Liaohe Plain Soil 70g/bottle
GBW07426 (GSS-12) Soil Composition Analysis Standard Material - Xinjiang Soil 70g/Bottle
GBW07427 (GSS-13) Reference material for soil composition analysis --70g/bottle of soil in North China Plain
GBW07428 (GSS-14) Soil Composition Analysis Standard Material - Sichuan Basin Soil 70g/Bottle
GBW07429 (GSS-15) Soil Composition Analysis Standard Material - Soil in the Middle and Lower Reaches of the Yangtze River, 70g/bottle
GBW07430 (GSS-16) Reference material for soil composition analysis - the Pearl River Delta soil 70g/bottle
GBW07446 (GSS-17) Soil Composition Analysis Standard Material - Inner Mongolia Urad Desertification Soil 70g/bottle
GBW07447 (GSS-18) Soil Composition Analysis Standard Material - Saline alkali Soil in Hangmian Houqi, Inner Mongolia 70g/bottle
GBW07448 (GSS-19) Soil Composition Analysis Standard Material - Brown Desert in Haiyan County, Qinghai Province 70g/bottle
GBW07449 (GSS-20) Soil Composition Analysis Standard Material - Shanshan Saline alkali Soil, Xinjiang 70g/bottle
GBW07450 (GSS-21) Soil Composition Analysis Standard Material - Grey Calcium Soil 70g/Bottle, Shihezi City, Xinjiang
GBW07451 (GSS-22) Reference material for soil composition analysis - Rizhao Yellow River mudflat sediment 70g/bottle
GBW07452 (GSS-23) Standard material for soil composition analysis -- like Shandong beach sediment 70g/bottle
GBW07453 (GSS-24) Reference material for soil composition analysis - Yangjiang South China Sea mudflat sediment 70g/bottle
GBW07454 (GSS-25) Soil Composition Analysis Standard Material - Luochuan Loess 70g/Bottle, Shaanxi Province
GBW07455 (GSS-26) Soil Composition Analysis Standard Material - Sediments from the Five Rivers and Huai River in Anhui Province, 70g/bottle
GBW07456 (GSS-27) Soil Composition Analysis Standard Material - Zhangjiagang Yangtze River Sediments 70g/Bottle
GBW07457 (GSS-28) Soil Composition Analysis Standard Material - Xiangjiang Sediments 70g/Bottle, Yiyang City

3、 Uniformity and stability

Randomly select 25 bottles from the small packaging unit bottle, use X-ray fluorescence spectroscopy to perform double analysis on representative elements with different contents and properties, and use analysis of variance to test. It is proved that the sample uniformity is good, and the small sample size for analysis is 0.1g. Stability has been tested and proven to be good. Valid until 2027.

4、 Fixed value test

The main methods used in constant value analysis and the elements tested are as follows. Plasma Mass Spectrometry: Ag As Ba Be Bi Br Cl Cd Co Cr Cs Cu Ga Hf I In Li Mn Mo Nb Ni P Pb Rb Sb Sc Sn Sr Ta Te Th Ti Tl U V W Zn Zr And REE; Plasma spectroscopy: B Ba Be Co Cr Cu Li Mn Ni P Pb Sc Sr Ti V Zn Al Fe3+Mg Ca Na K; X-ray fluorescence spectroscopy: As Ba Br Ce Cl Co Cr Cu Ga Hf Mn Nb Ni P Pb Rb S Sc Sr Th Ti Y Zn Zr and main components (melting plate method); Neutron activation method: As Ba Ce Co Cr Cs Eu Hf La Lu Nd Rb Sc Sm Ta Tb Th U W Yb Zn Fe3+Na K; Flame atomic absorption method: Mn Mg Ca Na K; Atomic fluorescence method: As Bi Ge Hg Sb Se; Ion chromatography: Br Cl; Polarographic method: Mo W; Emission spectroscopy: Ag B Sn, etc; Spectral colorimetric method: I P Ti Fe3+; Capacity method: Si Al Fe3+Fe2+Mg Ca C S; Weight method: Si H2O+LOI.

5、 Recognized value and uncertainty

The standard value shall be determined based on a minimum of 6 sets of fixed value data, tested using accurate methods and with good accuracy; Data with a small number of sets (but not less than 3 sets) or accuracy that does not meet the requirements are considered as reference values and are represented by data in parentheses. The standard value uncertainty (U) is calculated using a formula, where uchar, ubb, and us are the uncertainties introduced by constant value, uniformity, and stability, respectively, and k is the inclusion factor, taken as k=2.

6、 Packaging and Storage

The sample is packaged in well sealed glass bottles, 70g/bottle, and stored in an air-conditioned room at around 25 ℃. After use, it should be tightly sealed and stored in a cool place.

7、 Testing unit

Jilin Geological Science Research Institute, Liaoning Geological and Mineral Resources Research Institute, Hubei Geological Experimental Research Institute, Geological Experimental Testing Center, Fujian Geological Testing Research Center, Anhui Geological Experimental Research Institute, Chengdu Comprehensive Rock and Mineral Testing Center of Sichuan Geological and Mineral Exploration and Development Bureau, Henan Rock and Mineral Testing Center, Shaanxi Geological and Mineral Experimental Research Institute, Shanxi Rock and Mineral Testing Institute, China Institute of Geology, Geophysics, and Geochemistry, China Atomic Energy, and Shanghai Institute of Ceramics.