| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic mercury measuring system and a pretreatment device thereof that can automatically measure mercury at a site having a sample to be measured, facilitates the continuation of accurate measurement by keeping the inside of the device clean, and easily suppresses the consumption of a reagent.SOLUTION: The downstream ends of pipes L1-L4 through which a decomposition reagent such as a potassium permanganate solution circulates and the downstream end of pipe L5 through which a hydroxylamine hydrochloride solution circulates are connected to intermediate points of a pipe L10. Thus, these reagents can be injected from the downstream end of the pipe L10 into a measurement/reaction tank 1. The pipe L5 through which a hydroxylamine hydrochloride solution circulates is connected to the pipe L10 on the upstream side of the pipe L3 through which the potassium permanganate solution circulates.SELECTED DRAWING: Figure 1 |
