Abstract：The iron-rich clay exists in some regions of deep sea and ocean. At present, there are no related standard substances and analysis method for iron-rich clay. The contents of Na2O, MgO, Al2O3, SiO2, P2O5, K2O, CaO, TiO2, Mn, Fe, Cu, Zn, V, Sr, Zr, Ba, Pb and Y in abyssal iron-rich clay sample were rapidly determined in site using desktop X-ray fluorescence spectrometer through sample prepare by pressed powder pellet. The optimum conditions for sample preparation were as follows: the pressure was 30t and the pressing time was 35s. The calibration curves were prepared by national standard substances of polymetallic nodule and cobalt-rich crust, deep sea and hemipelagic sediments as well as certified deep sea iron-rich clay samples, solving the problem of lack of iron-rich clay standard substances. The measurement conditions of 18 components were optimized. The matrix effect of major components including SiO2, CaO, Fe and Mn was corrected by empirical coefficient method. The detection limit was 3.67-1172μg/g. The results of precision test showed that the relative standard deviations (RSD, n=7) were between 0.3% and 2.2% for determination results of each component. The proposed method was applied for the analysis of actual samples. The found results were consistent with those obtained by other methods in laboratory. The proposed method could meet the requirements of simultaneous and rapid analysis of multiple components in iron-rich clay samples in field.
李强, 张学华. 粉末压片-X射线荧光光谱法测定深海富铁粘土中主次量组分[J]. 冶金分析, 2018, 38(4): 57-62.
LI Qiang, ZHANG Xue-hua. Determination of major and minor components in abyssal iron-rich clay by X-ray fluorescence spectrometry with pressed powder pellet. , 2018, 38(4): 57-62.
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