海水中总无机碳的气相色谱测定
DETERMINATION OF TOTAL INORGANIC CARBON IN SEA WATER BY GAS CHROMATOGRAPHY
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摘要: 海水中总无机碳是指溶解在海水中的分子状态的二氧化碳及碳酸盐和重碳酸盐的总和.其含量通常用海水pH值、总碱度以及水温和盐度的资料进行计算.显然,这样计算的结果包含了上述各项参数测定的所有误差,以及由温盐资料导出的无机硼酸盐和碳酸盐离解常数的不准确性.就一般的海洋学所用而言,这样的资料是可行的.但在一些精细的研究中,如海水中的二氧化碳系统的平衡,海水与大气之间气体交换速率等,就需要更准确的资料.海水中总无机碳的气相色谱测定,为直接和准确测定海水中总无机碳的含量提供了新的测试手段.Abstract: A sca-going bas chromatographic system for determination of total inorganic carbon in sea water is descrihcd.A new design of the sample stripping chamber and method of calibration for determination of total inorganic carbon in sea water by gas chromatography are presented and discussed.When the above new design and calibrating method are used,the operation is easy and analytical results are precise and reliable.
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