| 摘要 |
PROBLEM TO BE SOLVED: To easily judge the kind of pungency component by covering a support medium surface with the precipitate of a pungency component or the component contained in a plant containing the pungency component to form a pungency electrode. SOLUTION: A support medium for pungency component used as electrode is manufactured by coating the side surface of a copper wire having, for example, a diameter of 0.8mm and a length of 150mm with enamel, polishing one end with an emery paper, dipping it in a nitric acid having a concentration of 50%, using this as cathode and platinum as anode to carry a current thereto at a voltage of dc 2V, washing the electrolyzed end part with pure water, and then dipping the end part in glycerin for 30 seconds. A solution containing a pungency component is prepared by, for example, dissolving 0.01g of aryl isothiocyanate to 0.5ml of ethyl alcohol, and adding sulfuric acid so as to have a fixed pH value to 1ml in total. The treated copper wire end part is dipped in the solution and used as anode, a platinum wire is used as cathode to carry dc 1mA thereto for 1 minute, the end part is dipped in glutaraldehyde for 30 seconds after washing, and the resulting support medium surface is washed with pure water to form a pungency electrode. |
