化工技术与开发
化工技術與開髮
화공기술여개발
TECHNOLOGY & DVELOPMENT OF CHEMICAL INDUSTRY
2013年
3期
32-34
,共3页
催化动力学光度法%溴酸钾%溴甲酚绿%甲醛
催化動力學光度法%溴痠鉀%溴甲酚綠%甲醛
최화동역학광도법%추산갑%추갑분록%갑철
catalytic kinetic spectrophotometry%potassium bromate%bromocresol green%formaldehyde
在硫酸介质中,甲醛对溴酸钾氧化溴甲酚绿溶液褪色有显著的催化作用,褪色程度与甲醛含量成正比,据此建立了测定微量甲醛的催化动力学光度法.方法的最大吸收波长为445nm,在50℃水浴中反应22min,甲醛含量在0~14.0μg·(25mL)-1范围内具有良好的线性关系.将方法用于实验室废水中微量甲醛的测定,结果满意.
在硫痠介質中,甲醛對溴痠鉀氧化溴甲酚綠溶液褪色有顯著的催化作用,褪色程度與甲醛含量成正比,據此建立瞭測定微量甲醛的催化動力學光度法.方法的最大吸收波長為445nm,在50℃水浴中反應22min,甲醛含量在0~14.0μg·(25mL)-1範圍內具有良好的線性關繫.將方法用于實驗室廢水中微量甲醛的測定,結果滿意.
재류산개질중,갑철대추산갑양화추갑분록용액퇴색유현저적최화작용,퇴색정도여갑철함량성정비,거차건립료측정미량갑철적최화동역학광도법.방법적최대흡수파장위445nm,재50℃수욕중반응22min,갑철함량재0~14.0μg·(25mL)-1범위내구유량호적선성관계.장방법용우실험실폐수중미량갑철적측정,결과만의.
@@@@In sulfuric acid medium, formaldehyde had significant catalytic effect on potassium bromate oxidation of bromocresol green solution fade. The fade degree was proportional to formaldehyde content. Based on that, a new catalytic kinetic spectrophotom-etry method was set up to determine trace formaldehyde. The maximum absorption wavelength was at 445nm, the reaction time was 22 minutes in 50℃ water bath. The formaldehyde contents had a good linear relationship in range of 0~14.0 μg/25mL. The method had been used for the determination of trace formaldehyde in laboratory wastewater with satisfactory results.
