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.
[1] WANG Rui-hai, YAN Wei-zhi, CUI Jian, et al(王瑞海,闫伟志,崔 健,等). Methods for Chemical Analysis of Gypsum(石膏化学分析方法). Beijing: Standards Press of China(北京: 中国标准出版社),2012. [2] XIE Hua-lin, LI Tan-ping(谢华林,李坦平). Cement(水泥),2003,(7): 45. [3] HUANG Wen-xian, CHEN Pei-ling, LIU Jian-bin, et al(黄文娴,陈佩玲,刘健斌,等). Chinese Journal of Spectroscopy Laboratory(光谱实验室),2004,21(4): 742. [4] DU Gui-rong, CAO Shu-qin, XIE Shu-jun(杜桂荣,曹淑琴,谢树军). Chemical Analysis and Meterage(化学分析计量),2007,16(1): 35. [5] CHEN Shi-yan, HE Zhen-yun(陈世焱,和振云). Analysis and Testing Technology and Instruments(分析测试技术与仪器),2011,17(4): 217. [6] HAN Hai-yan(韩海雁). Jounal of Hunan University of Science and Engineering(湖南科技学院学报),2009,30(4): 94. [7] XIE Hua-lin, LI Ai-yang, WEN Hai-chu(谢华林,李爱阳,文海初). Fly Ash Comprehensive Utilization(粉煤灰综合利用),2003,(6): 38. [8] YANG Xiao-mei,ZHAO Qing(杨晓梅,赵 清). Sulphur Phosphorus & Bulk Materials Handling Related Engineering(硫磷设计与粉体工程),2008(6): 39. [9] SHI Jing-yan(石景燕). Environmental Science & Technology(环境科学与技术),2012,35(6I): 263.