| 光谱学与光谱分析 |
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| Determination of Multi-Element Contents in Gypsum by ICP-AES |
| GUO Zhong-bao, BAI Yong-zhi，CUI Jin-hua，MEI Yi-fei，MA Zhen-zhu |
| China Building Material Test & Certification Group Co. Ltd.，Beijing 100024, China |
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Abstract The content of multi-element in gypsum was determined by ICP-AES. The sample was pretreated by acid-soluble method or alkali-fusion method. Acid-soluble method is suitable for the determination of CaO，SO3，Al2O3，Fe2O3，MgO，K2O，Na2O，TiO2，P2O5，MnO，SrO and BaO. Alkali-fusion method is suitable for the determination of CaO，SO3，SiO2，Al2O3，Fe2O3，MgO，TiO2，P2O5，MnO，SrO，BaO and B2O3. Different series standard solutions were prepared considering the properties and content of elements and solution matrix. The limit of detection and quantification were confirmed for each element under their best analysis spectral lines. The recoveries of the two pretreatment methods were from 93% to 110%, besides that for TiO2 was 81%～87% as pretreated by acid-soluble method. All RSDs(n=6)of tests were from 0.70%～3.42%. The accuracies of CaO and SO3 with ICP-AES method were less than the chemical analysis method. The determination of CaO and SO3 with ICP-AES method is only suitable for the case of low accuracy requirement. The results showed that the method can be used for the determination of multi-element contents in gypsum, with simple operation, fast analysis and reliable results. Total elements can be analysed with both acid-soluble method and alkali-fusion method.
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Received: 2013-09-16
Accepted: 2013-12-05
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Corresponding Authors:
GUO Zhong-bao
E-mail: gzb@ctc.ac.cn
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