| 摘要 |
PURPOSE:To make the pretreatment unnecessary, by separating a cyanide ion, a thiocyanate ion or these salts by a separation column for a liquid chromatography and bringing out the color development by adding a coloring reagent continuously and then, carrying out a colorimetric determination. CONSTITUTION:Anion exchange resin is packed in column 4 circulating 30 deg.C warm water through a jacket. An acetic acid buffer solution controlled at 5.0pH and containing 0.1M sodium perchlorate, is sent out from an eluate storage vessel 1 by a pump 2 and a chloramine T solution is sent out from a chlorination solution storage vessel 22 by a pump 20 and then, a barbituric acid-pyridine reagent is sent out from a coloring reagent solution storage vessel 27 by a pump 25. Colorimetry of sample reached a transparent cell 35 through a coloring reaction tube 7 is carried out by a detector 8 consisting of a light source 33, a spectral material 34, a photodetecting element 36, an amplifier 37 and a recorder 38. In such constitution, a cyanide ion and a thiocyanate ion, are determined by one operation only and the apparatus is simplified because pretreatment such as distillation is unnecessary. |
