| 摘要 |
There is provided a method for producing a sampling tube for carbonyl compound, manifesting low blank value and enabling analysis of carbonyl compounds such as formaldehyde and the like in air or in water with high sensitivity and high accuracy by a simple manner, which comprises the following steps: contacting a cation exchanger packed in a tube with a hydrophilic solvent or a mixed solvent containing this; contacting the cation exchanger contacted with a hydrophilic solvent or a mixed solvent containing this with a solution of a compound of the following structural formula (1): [in the formula, R<1>, R<2>, R<3>, R<4 >and R<5 >each independently represent a hydrogen atom, halogen atom, alkyl group, haloalkyl group, alkoxyl group, haloalkoxyl group, aryl group or haloaryl group, and R<6 >and R<7 >represent a hydrogen atom or alkyl group (wherein, when R<6 >and R<7 >represent a hydrogen atom, at least one of R<1>, R<2>, R<3>, R<4 >and R<5 >is not a fluorine atom)] or a salt thereof, to allow the cation exchanger to support the compound; and washing the cation exchanger supporting the compound with a hydrophilic solvent or a mixed solvent containing this two or more times.
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