DETECTION METHOD AND DETECTION DEVICE OF ANION IN LIQUID

摘要

PROBLEM TO BE SOLVED: To provide a detection method and a detection device of anions in liquid, having high strength of monolith, suppressing pressure loss in passing water, allowing ion-exchange capacity per volume to be enlarged, and needing less power consumption.SOLUTION: In an anion detection device, specimen fluid is passed through a desalination chamber of an electric-regenerative decationizing device to remove cations in the specimen fluid, and then anions in the liquid are measured. In the anion detection device in liquid, an organic porous cation exchanger filled in the desalination chamber is a continuous macro-pore structure where bubble-like macro-pores overlap with each other and overlapping portions become openings of an average diameter of 30 to 300 μm on a water-wet condition. Total pore volume is 0.5 to 5 ml/g, and cation exchange capacity per volume is 0.4 to 5 mg equivalent weight/ml on the water-wet condition. In an SEM image of a cross-section of the continuous macro-pore structure (a dry body), skeleton area appearing in the cross-section is 25 to 50% of an image domain.