摘要
探讨了海底沉积物中ＣａＣＯ３的测定方法。用１ｍｏｌ／ＬＮａＡｃ＋ＨＡｃ做碳酸盐相＋离子交换相的浸取剂，１ｍｏｌ／ＬＮａＡｃ做离子交换相的浸取液，在沸水浴中３０ｍｉｎ分解样品，然后用ＡＡＳ或ＩＣＰＡＥＳ分别测定离子交换相＋碳酸盐相及离子交换相中的Ｃａ，差减法计算样品中ＣａＣＯ３含量。方法经深海沉积物、水系沉积物等国家标准物质验证，结果与标准值相符。对同一样品进行１２次测定，相对标准偏差小于５％。
A method for determination of calcium carbonate in marine sediment was developed. 1 mol/L NaAc+HAc and 1 mol/L NaAc were used as infusions for ion-exchange+carbonate phase and ion-exchange phase respectively. Samples were digested in a water bath at 100℃ for 30 minutes, then Ca in ion-exchange+carbonate phase and ion-exchange phase were determined by AAS and/or ICPAES. The concentration of CaCO_3 in samples was calculated by using subtraction calculation procedure. The method has been verified by determination of CaCO_3 in national standard reference materials (GBW 07313 and GBW 07302). The results are in good agreement with the recommended values with precision of less then 5% RSD ( n =12).
出处
《岩矿测试》
CAS
CSCD
北大核心
1998年第2期127-130,共4页
Rock and Mineral Analysis
基金
中国新星石油公司资助
关键词
海底
沉积物
碳酸钙
物相分析
calcium carbonate, marine sediment, subtraction calculation procedure
