【摘要】 <正> 1961年,Wilsion提出以过硫酸盐氧化法测定有机碳,引起了人们的关注。首先Menzel等经过改进用于测定海水中溶解的和颗粒有机碳。后来Mills等和Froelich等又应用于海洋沉积物中有机碳的测定。但都需要分离碳酸盐。操作繁琐,费时较长。 我们设计了一种新的双球反应器,并以Ag₂SO₄为催化剂,结合非水溶液滴定法测定沉积物样品所产生的二氧化碳。更多还原

【Abstract】 This paper presents the titrimetry of persulfate-nonaqueous solution with sequential determination of the organic and the inorganic C contents in marine sediments. In a particularly designed paired-ball reactor, the inorganic and organic C contents of a sample was determined separately, yet simultaneously. The carbonates need not be separated beforehand. The Ag2SO4 was used as a catalyst and the time of oxidization was shortened considerably.The optimal conditions have been found. That is, the carbonates of samples are reactivated initially with 3M H3PO4, the inorganic C content is obtained, and then the K2S2O8 (oxidizer) and Ag2SO4 added to the reactor. The reactionary temperature is controlled within 120-130℃ and the organic C content is determined.This method, which is more accurate, simple and rapid, has been successfully applied to the analysis of samples of Oceanic sediments with excellent precision of less than ±0.02%.更多还原