Enhanced Performance Liquid Chromatography with Variable Wavelength Detector (VWD HPLC)

Features:
LC-204 high-voltage constant-current pump features
LC-204 dual-piston high-pressure pump is a constant series reciprocating Heng Flow pump, high flow accuracy; l subdivision stepping motor control technology allows the motor to run at low speed 
Smooth and accurate, to improve the accuracy and repeatability of analytical results at low flow rates, effectively ensuring the high-pressure gradient system 
Under low flow systems and mobile phase composition stability; 
The key component installation guide l floating plunger rod, plunger rod and a selection of high-quality seals, etc. 
To ensure that the constant high pressure infusion pump long running stability and durability; 
mobile phase compressibility factor correction and flow calibration accuracy dual function, depending on the solvent system differences 
Error compensation in flow velocity within ± 15% range, ensuring a high flow accuracy; 
via RS-485 chromatography workstation external control can be easily obtained with high accuracy high-pressure gradient 
Of the system, while the mobile phase velocity gradient can be achieved to meet the various requirements of production and research; 
Real-time pressure monitoring display, high pressure limit, low limit alarm function to ensure the safety of equipment used; 
large flow flushing solvent substitution function, reducing the solvent displacement time, improve work efficiency; 
with an OLED display module, friendly interface, easy and flexible operation. 
Performance analysis of LC-4000 pump technical indicators 
Flow Range: 0.001mL / min ~ 10.000mL / min (step is set to 0.001mL / min) 
Flow accuracy: ≤ ± 1% (1.000mL / min, 8.5MPa, water, room temperature) 
Flow Stability: RSD≤0.25% 
Maximum working pressure: 43MPa (0.001mL / min ~ 10.000mL / min) 
Pressure fluctuation: <0.1MPa (flow 1mL / min, pressure 5MPa ~ 10MPa) 
Power: AC 110V / 220V, 50Hz / 60Hz 
Power consumption: 100W 
Dimensions (L × W × H): 260mm × 360mm × 170mm / 10.0kg 
LC-204 variable wavelength UV / visible spectrophotometric detector 
Instrument features 
l advanced optical cell design; 
 Detector optical system into the new design ideas. As we know, the UV detector principle is Based on the Lambert - Beer law, so we focus on the improvement of the optical path above the road and so the sample is located 
The reference light path of light for maximum battery power. SEV UV501 detector is designed with today's most advanced technology Surgery for the pilot, through digital data processing and control, so that baseline noise and drift down to a new Limit. As a result of the digital output function, the detector can be connected to a computer via serial port directly Without the need for any of the data acquisition unit. 
Wherein, I1 is the sample path light intensity, I0 is the intensity of the reference light path, ε is the molar extinction coefficient, L is the flow Cell path. 
 
Key improvements: 
1) light source 2) optical path 
Filter 3) new design 4) use holographic grating 
l The new flow cell; 
l the whole digital signal processing and control system; 
l Integrated voltage integrated new design to make a more stable power supply, suitable for explosion-proof occasions. 
 
Technical Parameters 
Wavelength range: 170nm ~ 900nm 
Wavelength repeatability: ± 0.1nm 
Wavelength accuracy: ± 1nm 
Band width: 6nm 
Baseline noise ≤2 × 10-5AU (methanol, 1ml / min, 254nm, 20 ºC) 
Baseline drift ≤4 × 10-4AU / hr (methanol, 1ml / min, settling time 60min, 254nm, 20 ºC)
Baseline noise ≤0.5 × 10-5AU (empty pool, response time 1 second, 20 ºC) 
Baseline drift ≤0.5 × 10-4AU / hr (empty pool, 1 second response time, settling time 60min, 20 ºC) 
The minimum detectable concentration ≤1 × 10-9g / ml (naphthalene / methanol solution) 
Flow cell volume: 10μL 
Optical path: 5mm 
Source: Deuterium lamp 
Power: AC 110V / 220V, 50Hz / 60Hz 
Power consumption: 100W 
Dimensions (L × W × H): 260mm × 360mm × 170mm / 10.0kg