| 摘要 |
PURPOSE:To obtain a control analytical method suitable on the spot, by measuring a hexacyanoferrate (III) ion formed by the substitution reaction of silver hexacyanoferrate (III) and a chloride ion when the concn. of chloride used in the technical field of environmental chemistry, food chemistry or medical chemistry is measured. CONSTITUTION:Powdery silver hexacyanoferrate (III) and powdery filter paper are mixed to form a matrix 1 which is, in turn, allowed to fill a glass tube having an inner diameter of about 4mm and filter paper 2 is inserted in both ends of said glass tube to form a capillary tube. Next, one end of the capillary tube is immersed in a sodium chloride solution with concn. of 0-1% and the other end thereof is connected to an aspirator suction passage 3 connected to a handy pump to suck the sodium chloride solution. Thereafter, a known polarograph is adapted to the solution gathered on the side of the handy pump to measure the current based on the hexacyanoferrate (III) ion in the solution and the concn. of chloride is determined from the calibration curve of the current value being obtained and the concn. of the sodium chloride solution. |
