Refractive Index Detector Application scope
Evaporative light scattering detector (ELSD) has been widely used in the detection of carbohydrates, lipids, fatty acids, amino acids, drugs and polymers, especially in the determination of the effective components of traditional Chinese medicine and traditional Chinese patent medicines and simple preparations without purple absorption.

Refractive Index Detector Principle Introduction
Evaporative Light Scattering Detector (ELSD) is a universal detector that detects any sample with lower volatility than the mobile phase, and the sample does not need to have light absorption characteristics.
Can solve the detection difficulties of HPLC, such as phospholipids, sugars, undifferentiated fatty acids, and amino acids, without the need for pre column and post column derivatization;
Signal response is related to sample quality and can obtain quality information of unknown substances;
Wide gradient and solvent compatibility, no solvent peak interference (multiple solvent gradients can obtain stable baselines, no solvent peak interference, and are less affected by temperature);
When separating complex samples, appropriate modifiers such as ammonium acetate, glacial acetic acid, formic acid can be added to the mobile phase TFA， Ammonia water, triethylamine, etc.

UM 5000 outperforms similar products
*Upgraded product of domestically produced evaporative light scattering detector ELSD UM3000 (filling the gap in localization)
The various personality indicators of the instrument have reached the same level as similar products, with high cost-effectiveness
P. The S UM3000, as a major research and development achievement of the national "15th Five Year Plan" for scientific and technological breakthroughs, began development in 2004 and officially passed the acceptance of the Ministry of Science and Technology in May 2007, receiving multiple honors such as BCEIA and domestic recognition.

UM 5000 Performance Features
Zui low noise level
Ultra high sensitivity: obvious advantages of sensitivity and dynamic range
Low temperature evaporation, capable of providing a stable high temperature evaporation temperature of 130 ℃
Performance indicator level, domestic instrument price, yes evaporative light scattering detector
Having the highest configuration among similar products: currently the world's * instrument that uses a combination of semiconductor lasers and photomultiplier tubes for detection

UM 5000 Instrument Performance Parameters
Environmental conditions: Room temperature 15-30 ℃, relative humidity less than 90%
Temperature range of evaporation zone: room temperature to 130 ℃
Temperature regulation increment of 1 ℃
Temperature control accuracy ± 1 ℃
Gas requirements: nitrogen or air
Gas input pressure 2-5 bar
Gas pressure measurement accuracy of 0.01 bar
Gas consumption 1-4 L/min
Gas flow accuracy 0.02 L/min
Solvent flow rate 10 μ l~3 mL/min
Light source 650 nm laser diode
Detection element photomultiplier tube laser
Detection limit<1 ng (glucose, direct injection)
Baseline noise<0.05 mV (flow rate 1 ml/min)
Baseline drift<0.5 mV (flow rate 1 ml/min)
The typical quantitative range is 0.1-30 μ g (glucose, HPLC）
Quantitative repeatability RSD6<2% (glucose, flow rate 1 ml/min)
Signal output 0-10 mVDC, or 0-1 VDC
Computer interface
RS232

Instrument configuration
1. One evaporative light scattering detector
2. 1 set of workstation software
3. 1 air compressor
4. 1 set of related accessories