食品研究与开发
食品研究與開髮
식품연구여개발
FOOD RESEARCH AND CEVELOPMENT
2013年
1期
94-96
,共3页
动力学光度法%β-环糊精%硒
動力學光度法%β-環糊精%硒
동역학광도법%β-배호정%서
Catalytic Photometry%β-CD%selenium
基于在硝酸介质中,β-环糊精对硒催化溴酸钾氧化罗丹明B的褪色反应具有增敏作用,建立了测定硒的催化动力学光度法,灵敏度较不加~环糊精的方法提高了2.5倍.测定硒的线性范围:0~40μg/L,检出限为0.381μg/L,加标回收率为98.87%,6次测定的RSD小于5%.用于富硒大米中硒的测定,结果令人满意.
基于在硝痠介質中,β-環糊精對硒催化溴痠鉀氧化囉丹明B的褪色反應具有增敏作用,建立瞭測定硒的催化動力學光度法,靈敏度較不加~環糊精的方法提高瞭2.5倍.測定硒的線性範圍:0~40μg/L,檢齣限為0.381μg/L,加標迴收率為98.87%,6次測定的RSD小于5%.用于富硒大米中硒的測定,結果令人滿意.
기우재초산개질중,β-배호정대서최화추산갑양화라단명B적퇴색반응구유증민작용,건립료측정서적최화동역학광도법,령민도교불가~배호정적방법제고료2.5배.측정서적선성범위:0~40μg/L,검출한위0.381μg/L,가표회수솔위98.87%,6차측정적RSD소우5%.용우부서대미중서적측정,결과령인만의.
@@@@A catalytic kinetic photometric method for determination of trace selenium(1V) withβ-CD as sensiti-zer has been developed.The method is based on the fact that the color fading reaction of rhodamine B oxidized by potassium bromate in dilute HNO3 solution is catalyzed by selenium (1V). The addition ofβ-CD increases the sensitivity of selenium by a factor of 2.5.The linear range for determination of selenium is 0-40 μg/L with detec-tion limit of 0.381μg/L.The recovery of standard addition is 98.87%with precision of<5%RSD (n=6). The method has been applied to the determination of trace selenium (1V) in selenium rice with satisfactory re-sults.
