【摘 要】
:
A sensitive,simple and low-cost method based on capillary electrophoresis(CE) with electrochemical(EC) detection at a carbon fiber microdisk electrode(CFE) was
【机 构】
:
State Key Laboratory of Electroanalytical Chemistry, Ministry of Public Security of lilin Province
【基金项目】
:
Supported by the National Natural Science Foundation of China
论文部分内容阅读
A sensitive,simple and low-cost method based on capillary electrophoresis(CE) with electrochemical(EC) detection at a carbon fiber microdisk electrode(CFE) was developed for the determination of nicotine.Effects of detection potential,concentration and pH value of the phosphate buffer,and injection time as well as separation voltage were investigated.Under the optimized conditions:a detection potential of 1.20 V,40 mmol/L phosphate buffer(pH 2.0),a sample injection time of 10 s at 10 kV and a separation voltage of 16 kV,the linear range obtained was from 5.0× 10 7 mol/L to 1.0× 10-4 mol/L with a correlation coefficient of 0.9989 and the limit of detection(LOD,S/N=3)obtained was 5.0× 10-8 mol/L.The method was also used to determine the nicotine in cigarettes.Nicotine amount ranged from 0.211 mg/g to 0.583 mg/g in the pipe tobacco of seven brands of cigarette and the amount in one cigarette varied from 0.136 mg/cigarette to 0.428 mg/cigarette.
其他文献
Novel spiro[dibenzo[a,i]xanthene-14,3 -indoline]-2'8,13-triones were prepared by the three-component reaction of β-naphthol,isatins,and 2-hydroxy-1,4-naphoquin
Polyimides have been widely used in aerospace and microelectronics due to their excellent mechanical properties and thermo oxidative stability[1].However,most o
Modifications were made on the traditional split Hopkinson pressure bar (SHPB)system to conduct dynamic shear tests.The shear response of Ti-6Al-4V was acquired
This paper preseuts results of model tests for the landslide dam failure of a single dam and cascade dams in a sloping channel.The dams were designed to be regu
Photo-grafting of hydrophilic monomer and space arms was used to enhance the hydrophilicity of poly(ether ether ketone)(PEEK) with the aim of extending its appl
DICER-like (DCL) proteins produce small RNAs that silence genes involved in development and defenses against viruses and pathogens.Which DCLs participate in pla
In this article,we study the generalized Riemann problem for a scalar nonconvex Chapman-Jouguet combustion model in a neighborhood of the origin (t > 0) on the (
In this paper,we propose a balanced multi-label propagation algorithm (BMLPA) for overlapping community detection in social networks. As well as its fast speed,
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
The errors in radar quantitative precipitation estimations consist not only of systematic biases caused by random noises but also spatially nonuniform biases in