The high temperature titration of biogenic silica

被引：2
作者：
Lee, K
Sackett, WM
机构：
[1] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Cooperat Inst Marine & Atmospher Studies, Miami, FL 33149 USA
[2] Univ S Florida, Dept Marine Sci, St Petersburg, FL 33701 USA
来源：
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS | 1998年 / 45卷 / 06期
关键词：
D O I：
10.1016/S0967-0637(97)00108-8
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
A new method has been developed for measuring biogenic silica (amorphous) in marine sediments. It is based on the Hogbom-Urey reaction CaCO3 + SiO2 (biogenic silica) --> CaSiO3 (wollastonite) + CO2. The reaction is carried out in evacuated sealed glass tubes with added excess reagent grade calcite at 500 degrees C for 3 d. The product CO2 is measured in a calibrated manometer. The dependence of the reaction on time, temperature, product CO2 pressure, and other factors is examined. (C) 1998 Elsevier Science Ltd. All rights reserved.
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页码：1015 / 1028
页数：14
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