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気象研究所技術報告

第57号

閉流路中のフローセルを用いた分光光度法自動分析装置による 海水の高精度pH_T 測定

斉藤秀、石井雅男、緑川貴、井上（吉川）久幸

December 2008
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	序文
	概要
	Contents
1	Introduction
2	Methods and materials
2.1	Principles
2.2	Apparatus
2.3	Preparation of dye solution
2.4	Perturbation caused by addition of dye solution
2.5	Correction for temperature deviations
2.6	Seawater samples
2.7	Certified reference materials (CRMs) and working standards
3	Onboard measurements
4	Measurements of bottle samples taken at depth
4.1	Effects of bottling and headspace
4.2	Perturbation of pHT caused by addition of saturated HgCl2 solution
4.3	Storage of samples
4.4	Uncertainty in pHT measurements of bottle samples
5	Consistency of measured and calculated pHT values for CRMs and comparability of pHT data among several cruises
6	Procedure to measure pHTT with high comparability and precision
7	Discussion
7.1	Standard deviation of pHTT in reference materials
7.2	Origin of the pHTT perturbation caused by the addition of HgCl2
7.3	Internal consistency of CO2 system parameters
8	Summary
	Acknowledgements
	References