| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for determining arsenic which enables the concentration of arsenic in wooden building materials to be measured easily and accurately, without having to use expensive equipment. SOLUTION: A sample 2 is placed in an ash-free filter 1. A wooden building material containing CCA etc. after drying is crushed to 100 mesh or smaller and used as the sample 2. The ash-free filter 1 is longitudinally folded in three and laterally folded into three portions. The ash-free filter 1 enveloping the sample 2 is placed in a platinum cage 4 mounted to a stopper part (glass plug) 3 of a combustion flask. A small quantity of absorption liquid 6, for example, 5 ml of a 1 mM solution of hydrochloric acid, is place in a 500 ml conical flask 5 of the combustion flask, and oxygen is filled therein. The ash-free filter 1 is lit, and the platinum cage 4, to which the ash-free filter 1 is fixed, is inserted in the conical flask 5 to burn the sample 2 inside and to make an absorbent 6 absorb arsenic generated by the burning. In this way, arsenic is turned into a solution in this way. Thereafter, the absorbent 6 which has absorbed arsenic is analyzed. COPYRIGHT: (C)2011,JPO&INPIT
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