水質データの信頼性に関する二,三の考察

概要

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In many cases, water quality data have some differences from the correct values with some causes involving analytical methods and conditions in which samples were preserved. This experiment was carried out to examine the fluctuation of analytical values and the effect of conditions of sample preservation. It was found that the fluctuation of measured values of both total solids and dissolved solids was comparatively large, and that in determination of biochemical oxygen demand, dissolved oxygen concentration of diluted sample 15min after preparation was little deviated, however dissolved oxygen value of the sample after five days' incubation sometimes showed a marked fluctuation. Chloride ion concentration did not change when sample preservation was prolonged, but biochemical oxygen demand and chemical oxygen demand values varied considerably, so that it is necessary to analyze them as early as possible.
山梨大学の論文