THE DETERMINATION OF CARBONATE CONTENT IN MARINE SEDIMENTS BY AUTOMATIC POTENTIOMETRIC TITRATOR
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摘要: 基于容量法原理,探讨了海底沉积物中碳酸盐的自动电位滴定法,配合tiamo软件,自动计算并输出测定结果。该法简单快速,且可以批量测试,经深海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7次测定,其结果的相对标准偏差小于0.9%。该方法应用于西菲律宾海岩心MD06-3050的部分样品,测试结果与ICP-OES方法得到的结果具有一致性,该方法再现性良好,准确可信。Abstract: Based on the volumetric method, the determination of carbonate content in marine sediment was carried out by automatic potentiometric titrator with related software-tiamo, which can export the results automatically. This method is simple and rapid for batch measurement. The results were consistent with standards defined by the National Standard Reference of Deep-Sea Sediment. Seven independent determinations were measured for the same sample, and the standard deviation of the results was less than 0.9%. Several samples of sediment core MD06-3050 were used to measure carbonate content by automatic potentiometric titrator and ICP-OES. The results of two methods were consistent.
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Key words:
- deep-sea sediment /
- carbonate content /
- automatic potentiometric titrator
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