建立了一种测定甲卡西酮的流动注射-化学发光新方法。在碱性条件下,甲卡西酮对铁氰化钾-鲁米诺化学发光体系的发光强度有显著的增敏作用,且在一定范围内,增强程度与甲卡西酮的浓度呈良好的线性关系。在本研究建立的方法下,检出限为1.1&#...建立了一种测定甲卡西酮的流动注射-化学发光新方法。在碱性条件下,甲卡西酮对铁氰化钾-鲁米诺化学发光体系的发光强度有显著的增敏作用,且在一定范围内,增强程度与甲卡西酮的浓度呈良好的线性关系。在本研究建立的方法下,检出限为1.1×10-4 g·L^(-1),甲卡西酮在1.2×10^(-4)~2.0×10^(-3)g·L^(-1)范围内,线性回归方程为Y=95.25c-37.38(r=0.9981,c为甲卡西酮的浓度);在2.0×10^(-3)~1.0×10^(-1)g·L^(-1)范围内时,线性回归方程为Y=2.840c+480.5(r=0.9922,c为甲卡西酮的浓度)。在生活污水中加标回收,分别对浓度为5.0×10^(-4)g·L^(-1)和2.0×10^(-3)g·L^(-1)的甲卡西酮溶液连续测定11次,其相对标准偏差(Relative standard deviation,RSD)为2.9%和4.7%。展开更多
A reverse flow injection chemiluminescence(CL) method for the determination of urapidil was firstly described. It was found that the CL intensity from the Luminol ClO - system could be enhanced in the presence of urap...A reverse flow injection chemiluminescence(CL) method for the determination of urapidil was firstly described. It was found that the CL intensity from the Luminol ClO - system could be enhanced in the presence of urapidil. The increase of CL emission was correlated with urapidil mass concentration in the range from 0.2 to 100 μg/mL, the detection limit was 0.01 μg/mL and the relative standard deviation was 1.3%( ρ =4 μg/mL, n =11), a sampling frequency of 150 h -1 was attained. The method was applied to the determination of leucoge in pharmaceutical preparations with recovery of 101.0% and 101.3% .展开更多
An on chip spiral channel flow cell for flow injection chemiluminescent system was prepared. Microchannels were fabricated using standard photolithography, wet chemical etching and thermal bonding techniques. Due to t...An on chip spiral channel flow cell for flow injection chemiluminescent system was prepared. Microchannels were fabricated using standard photolithography, wet chemical etching and thermal bonding techniques. Due to the long spiral channel on the chip and the oblate trapezoid cross section, there was enough time for the chemiluminescent reagents and sample to mix and react completely. The light produced can be easy to be recorded. The present on chip flow cell was used for the determination of some organic pollutants with peroxomonosulfate cobalt(Ⅱ)chemiluminescent system and mangnese(Ⅱ)with periodate carbonate chemiluminescent system. The detection limits for humic acid, 2 naphthol, benzo thiazole and mangnese(Ⅱ)are 3 0×10 -7 g·g -1 , 2 0×10 -6 mol·l -1 and 5 0×10 -7 mol·l -1 using peroxomonosulfate cobalt(Ⅱ)chemiluminescent system, and 5 0×10 -9 mol·l -1 using periodate carbo nate chemiluminescent system(S/N=3), respectively. The application of this flow cell to determine manganese(Ⅱ)in well water is also carried. The results are satisfactory.展开更多
文摘建立了一种测定甲卡西酮的流动注射-化学发光新方法。在碱性条件下,甲卡西酮对铁氰化钾-鲁米诺化学发光体系的发光强度有显著的增敏作用,且在一定范围内,增强程度与甲卡西酮的浓度呈良好的线性关系。在本研究建立的方法下,检出限为1.1×10-4 g·L^(-1),甲卡西酮在1.2×10^(-4)~2.0×10^(-3)g·L^(-1)范围内,线性回归方程为Y=95.25c-37.38(r=0.9981,c为甲卡西酮的浓度);在2.0×10^(-3)~1.0×10^(-1)g·L^(-1)范围内时,线性回归方程为Y=2.840c+480.5(r=0.9922,c为甲卡西酮的浓度)。在生活污水中加标回收,分别对浓度为5.0×10^(-4)g·L^(-1)和2.0×10^(-3)g·L^(-1)的甲卡西酮溶液连续测定11次,其相对标准偏差(Relative standard deviation,RSD)为2.9%和4.7%。
文摘A reverse flow injection chemiluminescence(CL) method for the determination of urapidil was firstly described. It was found that the CL intensity from the Luminol ClO - system could be enhanced in the presence of urapidil. The increase of CL emission was correlated with urapidil mass concentration in the range from 0.2 to 100 μg/mL, the detection limit was 0.01 μg/mL and the relative standard deviation was 1.3%( ρ =4 μg/mL, n =11), a sampling frequency of 150 h -1 was attained. The method was applied to the determination of leucoge in pharmaceutical preparations with recovery of 101.0% and 101.3% .
文摘An on chip spiral channel flow cell for flow injection chemiluminescent system was prepared. Microchannels were fabricated using standard photolithography, wet chemical etching and thermal bonding techniques. Due to the long spiral channel on the chip and the oblate trapezoid cross section, there was enough time for the chemiluminescent reagents and sample to mix and react completely. The light produced can be easy to be recorded. The present on chip flow cell was used for the determination of some organic pollutants with peroxomonosulfate cobalt(Ⅱ)chemiluminescent system and mangnese(Ⅱ)with periodate carbonate chemiluminescent system. The detection limits for humic acid, 2 naphthol, benzo thiazole and mangnese(Ⅱ)are 3 0×10 -7 g·g -1 , 2 0×10 -6 mol·l -1 and 5 0×10 -7 mol·l -1 using peroxomonosulfate cobalt(Ⅱ)chemiluminescent system, and 5 0×10 -9 mol·l -1 using periodate carbo nate chemiluminescent system(S/N=3), respectively. The application of this flow cell to determine manganese(Ⅱ)in well water is also carried. The results are satisfactory.
