摘要
采用重铬酸钾氧化-硫酸亚铁滴定法,建立了一套快速测定海洋沉积物中有机碳含量的方法。选择了海洋沉积物样品的粒径大小、干燥温度和干燥时间,探讨了催化剂的用量及氯离子的干扰和消除方法。方法是对国标GB/T 17378.5—1998的合理改进,大大地缩短了实验流程,降低了测定成本。对国家标准物质进行测定,并与仪器分析结果比对,证明本法可靠准确。
A rapid method for the determination of organic carbon in marine sediments by potassium dichromate oxidation-ferrous sulphate titrimetry was developed. Some important analytical parameters, such as sample grain size, drying temperature and time, were optimized. The dosage of catalyst as well as the interference from Cl and＇ the interference elimination were also discussed. This method, derived from the National Standard （GB/T 17378.5-1998 ） and modified reasonably, can greatly shorten the experimental procedure and reduce the cost. The accuracy and reliability of this method have been proved by analysis of National Standard Reference samples and comparison with other analytical methods.
出处
《岩矿测试》
CAS
CSCD
2007年第3期205-208,共4页
Rock and Mineral Analysis
基金
国家科技部科技基础性工作专项资金项目(2002DEB20070)
关键词
氧化滴定法
有机碳
快速测定
海洋沉积物
oxidation titrimetry
organic carbon
rapid determination
marine sediment
