Reference materials for oceanic CO2 analysis:: a method for the certification of total alkalinity
Reference materials for oceanic CO2 analysis:: a method for the certification of total alkalinity
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DOI：
10.1016/s0304-4203(02)00133-0
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发表时间：
2003-01-01
期刊：
影响因子：
3
通讯作者：
Anderson, GC
中科院分区：
文献类型：
--
作者：
Dickson, AG;Afghan, JD;Anderson, GC
本文介绍了一种海水总碱度标准物质的定值方法。该技术采用两阶段，电位，开孔滴定，使用库仑分析盐酸。使用最小二乘法（校正与硫酸根和氟离子的反应），从pH值3.0-3.5范围内的滴定点评价等效点。该技术的重现性（一个标准偏差）小于1 mumol kg（-1）;准确度在2 mumol kg（-1）以内。(C)2002 Elsevier Science B. V.保留所有权利。
This paper describes a method used to certify reference materials based on seawater for total alkalinity. The technique employs a two-stage, potentiometric, open-cell titration using coulometrically analyzed hydrochloric acid. The equivalence point is evaluated from titration points in the pH region 3.0-3.5 using a least-squares procedure that corrects for the reactions with sulfate and fluoride ions. The reproducibility (one standard deviation) of this technique is less than 1 mumol kg(-1); the accuracy is within 2 mumol kg(-1). (C) 2002 Elsevier Science B.V. All rights reserved.