应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2014年
6期
1143-1146
,共4页
韩倩%李贵荣%刘长鹤%甄红娇
韓倩%李貴榮%劉長鶴%甄紅嬌
한천%리귀영%류장학%견홍교
催化动力学荧光法%铬(VI)%溴酸钾%罗丹明 6G
催化動力學熒光法%鉻(VI)%溴痠鉀%囉丹明 6G
최화동역학형광법%락(VI)%추산갑%라단명 6G
catalytic kinetic spectrofluorimetry%chromium(VI)%potassium bromate%Rhodamine 6G
在醋酸-醋酸钠缓冲溶液中，铬（VI）催化溴酸钾氧化罗丹明6G（Rh6G）使其荧光强度减弱，据此建立一种催化动力学光度法测定环境水中铬（VI）的新方法。优化了反应和测定条件。该反应体系中 Rh6G 的最大发射波长λmax ＝555 nm。荧光值改变值与铬（ VI）的浓度在0.01~0.14μg/ mL 范围内呈良好线性关系，检出限为3.46 ng/ mL，相对标准偏差﹤4.96%，加标回收率为95.5%~102.9%。
在醋痠-醋痠鈉緩遲溶液中，鉻（VI）催化溴痠鉀氧化囉丹明6G（Rh6G）使其熒光彊度減弱，據此建立一種催化動力學光度法測定環境水中鉻（VI）的新方法。優化瞭反應和測定條件。該反應體繫中 Rh6G 的最大髮射波長λmax ＝555 nm。熒光值改變值與鉻（ VI）的濃度在0.01~0.14μg/ mL 範圍內呈良好線性關繫，檢齣限為3.46 ng/ mL，相對標準偏差﹤4.96%，加標迴收率為95.5%~102.9%。
재작산-작산납완충용액중，락（VI）최화추산갑양화라단명6G（Rh6G）사기형광강도감약，거차건립일충최화동역학광도법측정배경수중락（VI）적신방법。우화료반응화측정조건。해반응체계중 Rh6G 적최대발사파장λmax ＝555 nm。형광치개변치여락（ VI）적농도재0.01~0.14μg/ mL 범위내정량호선성관계，검출한위3.46 ng/ mL，상대표준편차﹤4.96%，가표회수솔위95.5%~102.9%。
In HAc-NaAc buffer medium,Rh6G was oxidized by potassium bromate with chromium(VI) as an catalyst,which resulting in fluorescence intensity decreased. A new catalytic kinetics spectrofluorim-etry for determination of trace chromium was established and the optimum conditions were studied. Maxi-mum emission peak of the reaction system located at 555 nm,the decreased fluorescence intensity was proportional to the concentration of Cr(VI)in the range of 0. 01 ~ 0. 14 μg / mL. The detection limit was 3. 46 ng / mL,RSD was less than 4. 96% ,and the recoveries were 95. 5% ~ 102. 9% .
