Measurement of picomole amounts of carbon dioxide by calorimetry.
Measurement of picomole amounts of carbon dioxide by calorimetry.
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通过量热法测量二氧化碳的皮摩尔量。
DOI：
10.1021/ac60354a024
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发表时间：
1975
影响因子：
7.4
通讯作者：
R. Corsey
中科院分区：
文献类型：
--
作者：
G. G. Vurek;D. Warnock;R. Corsey
测量皮摩尔量的碳酸氢盐和二氧化碳可用于研究肾脏控制身体pH值的机制。这些研究可能涉及收集含有少于300皮摩尔二氧化碳（作为碳酸氢盐离子和溶解气体）的几纳升液体（1）。少量的二氧化碳已经用pH电极（2-4）间接测量，电导测量（5，6），转化为甲烷，随后用火焰离子化检测器分析（7），以及当含二氧化碳的样品与酸在封闭系统中混合时测量压力升高（8）。也可以使用质谱仪。二氧化碳与氢氧化锂的反应热已被提议作为大气CO2监测方案（9）。本文介绍了一种测量LiOH与CO_2反应放热的简易装置及其在CO_2测量中的应用，其灵敏度小于10皮摩尔。
The measurement of picomole amounts of bicarbonate and carbon dioxide is useful in the studying of the mechanisms by which the kidney controls body pH. These studies may involve collection of a few nanoliters of fluid containing less than 300 picomoles of carbon dioxide (as bicarbon-ate ion and dissolved gas)(1). Small amounts of carbon dioxide have been measured indirectly with pH electrodes (2-4), conductimetrically (5, 6), by conversion to methane with subsequent analysis using a flame ionization detector (7), and by measuring the pressure rise when carbon dioxide-containing samples are mixed with acid in a closed sys-tem (8). Mass spectrometers can also be used. The heat of reaction of carbon dioxide with lithium hydroxide has been proposed as an atmospheric CO2 monitoring scheme (9). This paper describes a simple apparatus to measure the heat released when LiOH and CO2 react and itsapplication to the measurement of carbon dioxide with a sensitivity of less than 10 picomoles.