New solution and selection
The qCE system brings a breakthrough change for the traditional CE！
A quantitative capillary electrophoresis was developed by utilizing a rotary type of nano-volume injector, an auto-sampler, and a thermostat with cooling capacity. The nano-injector with an accurate internal loop provides a new solution for the problem of accurate quantification in CE. The accuracy and precision were greatly improved compared with conventional CE.
Introduction of core modules
Auto sampler
All of the modules of the quantitative CE system were autom atically controlled by a computer program.
Nano-injector
1. The injection volume accuracy was guaranteed by the carefully designed nano-injector with an accurate internal loop
2. Applies to all types of samples and have no discrimination effects
3. Continuous on-line analysis can be performed and have no need to interrupt the process of electrical balance
4. Have no cross-contamination between the samples and the buffers
5. Valve injection is simple, convenient and safe
Electrical decoupler
1. Allowed electrical current to flow between the buffer and capillary but without permeating the buffer and sample to
pass through the membrane on the capillary
2. Realizing the technology of powering on capillary
3. Isolating the injector from the electrical field
Thermostat
1. Temperature control medium: liquid
2. Temperature range: 4~40℃
Items Description Overall performance Qualitative reproducibility(%) ＜0.8 Quantitative reproducibility(%) ＜1.0 Solvent delivery system Range (mL/min) 0.001-10.000 Precision (% RSD) ≤0.1 Accuracy (%) ±2 Autosampler Injection precision ＜1.0 Injection accuracy ＜2.0 UV/Vis Range (nm) 190-700 Precision (nm) ≤1 Repeatability (nm) ≤0.1 Band Width (nm) 8 Baseline noise (AU) ±0.25*10-5 Baselinedrift (AU/h) ＜1.0*10-4 LOD (g/mL) ≤1.0*10-6 High voltage power supply Voltage range (kV) 0-±30 Current range (μA) 0-100 Voltage stability ≤1.5% (in 3 min) Working environment requirement Workingtemperature 15-30 Storage temperature 0-40 Relative humidity ＜90% Power supply 220 V ± 10% Power frequency (Hz) 50 ± 0.5 Determination of six synthetic adulterants in weight-loss products
Capillary: 50 μm i.d., 360 μm o.d.
Effective length/ Overall length: 40 cm/60 cm
Buffer: 20 mM NaH2PO4/H3PO4(pH2.0)
Voltage: 15 kV
Pressurized flow by syringe pump: 0.6 μL/min.
Split ratio (no electric field) : 10:1
Temperature: 15℃
Wavelength： 195 nm
Injection volume: 10 nL
Samples: 1. pseudoephedrine 2. norepinephrine 3. fenfluramine
4. clenbuterol 5. sibutramine 6. Amfebutamone
Determination of five preservatives in cosmetics
Capillary: 50 μm i.d., 360 μm o.d.
Effective length/ Overall length: 40 cm/60 cm
Buffer: 15 mM sodium borate +100 mM SDS (pH 9.30)
Voltage: 20 kV
Temperature: 15℃
Wavelength: 254 nm
Injection volume: 10 nL
Pressurized flow by syringe pump: 1 μL/min
Split ratio (no electric field): 13:1
Samples: 1. MP 2. benzoic acid 3. EP 4. PP 5. BP
The baseline separation of six nucleosides
Capillary: 50 μm i.d., 360 μm o.d.
Effective length/ Overall length: 40 cm/60 cm
Voltage: 15 kV
Wavelength: 254 nm
Injection volume: 10 nL
Temperature: 12 ℃
Buffer: 30 mM sodium borate (pH 9.40)
Pressurized flow by syringe pump: 1 μL/min.
Split ratio (no electric field) : 13:1
Samples: (a)cytosine (b) 5-fluoro-2'–deoxyuridine (c) adenosine
(d) uracil (e) uridine (f) creatinine
Click to enlarge figure3D-ShowProduct name：qCETM3010
Product model：qCETM3010
Product overview
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