化工技术与开发
化工技術與開髮
화공기술여개발
TECHNOLOGY & DVELOPMENT OF CHEMICAL INDUSTRY
2013年
5期
30-32
,共3页
催化显色光度法%邻氨基酚%测定%铜
催化顯色光度法%鄰氨基酚%測定%銅
최화현색광도법%린안기분%측정%동
catalytic colouration spectrophotometry%o-aminophenol%determination%copper
以乙酸-乙酸钠缓冲溶液(pH=5.6)为介质,过氧化氢在微量Cu(Ⅱ)的催化作用下,氧化邻氨基酚显色,显色程度与Cu(Ⅱ)含量成正比.方法的最大吸收波长为463nm,在冰水浴中反应10min,Cu(Ⅱ)含量在0~10μg·mL-1范围内呈线性关系,回归方程为A=0.007c+0.0129.此方法用于污水中微量铜的测定,RSD为3.21%(n=6),加标回收率在90.6%~109.9%之间.
以乙痠-乙痠鈉緩遲溶液(pH=5.6)為介質,過氧化氫在微量Cu(Ⅱ)的催化作用下,氧化鄰氨基酚顯色,顯色程度與Cu(Ⅱ)含量成正比.方法的最大吸收波長為463nm,在冰水浴中反應10min,Cu(Ⅱ)含量在0~10μg·mL-1範圍內呈線性關繫,迴歸方程為A=0.007c+0.0129.此方法用于汙水中微量銅的測定,RSD為3.21%(n=6),加標迴收率在90.6%~109.9%之間.
이을산-을산납완충용액(pH=5.6)위개질,과양화경재미량Cu(Ⅱ)적최화작용하,양화린안기분현색,현색정도여Cu(Ⅱ)함량성정비.방법적최대흡수파장위463nm,재빙수욕중반응10min,Cu(Ⅱ)함량재0~10μg·mL-1범위내정선성관계,회귀방정위A=0.007c+0.0129.차방법용우오수중미량동적측정,RSD위3.21%(n=6),가표회수솔재90.6%~109.9%지간.
Under the catalysis of trace Cu(Ⅱ), the o-aminophenol was oxided to color by hydrogen peroxide in the acetic acid-sodium acetate buffer solution medium(pH=5.6).The maximum absorption wavelength of this method was at 463nm and the reaction time was 10 min in the ice-water bath. A linear relationship of Cu(Ⅱ) was established in the range of 0~10μg/mL. The regression equation of calibration curve was A=0.007c+0.0129.This method was used to determine the trace copper in the polluted water, the RSD was 3.21%(n=6) and the recovery of standard addition was between 90.6%~109.9%.
