CAJ | 학술논문

以水为萃取剂,利用微波从刨花板中萃取甲醛;甲醛与酚试剂反应生成嗪,嗪在三价铁离子存在下被氧化成蓝绿色的络合物,该络合物在630 nm处有吸收,进而测定刨花板中甲醛的含量.最佳萃取条件为:120℃萃取20 min.最佳显色条件为:0.1 mol/L的盐酸溶液用量10 mL,硫酸铁铵溶液用量0.4 mL,酚试剂用量2.0 mL,反应温度30℃,反应时间40 min.线性回归方程为:y=0.352 7x+0.082,相关系数R2=0.999 4.方法相对标准偏差为0.249 7%,方法回收率为97.08%~101.7%.
이수위췌취제,이용미파종포화판중췌취갑철;갑철여분시제반응생성진,진재삼개철리자존재하피양화성람록색적락합물,해락합물재630 nm처유흡수,진이측정포화판중갑철적함량.최가췌취조건위:120℃췌취20 min.최가현색조건위:0.1 mol/L적염산용액용량10 mL,류산철안용액용량0.4 mL,분시제용량2.0 mL,반응온도30℃,반응시간40 min.선성회귀방정위:y=0.352 7x+0.082,상관계수R2=0.999 4.방법상대표준편차위0.249 7%,방법회수솔위97.08%~101.7%.
The formaldehyde was extracted from the particle board using microwave extraction and water as solvent. The formaldehyde and phenol reaction generated piperazine, which was further oxidized into the blue- green complex in the presence of Fe3+. The complex's absorption peak was at 630 nm. According to the change at the absorption peak, the content of formaldehyde in particle board was determined. The optimum extraction conditions were that the extraction temperature was 120 ℃, the extraction time was 20 min. The optimal coloration conditions were as fol ows: 10 mL 0.1 mol/L hydrochloric acid, 0.4 mL ferric ammonium sul-fate solution, 2.0 mL phenol reagent solution, and the reaction temperature was 30 ℃, the reaction time was 40 min. The linear regression equation was y=0.352 7x+0.082, the linear correlation coefficient R2=0.999 4. The relative standard deviation was 0.249 7%and the recovery was 97.08%~101.7%.