Which domestic liquid chromatograph is better?

LC98I and LC98II series HPLC instruments of Beijing Thermometric Analysis Instrument Technology Development Co., Ltd. are good.

Wenzhou Branch fully considered the humanized design concept of the instrument in the manufacturing process, which made the instrument easy to operate and maintain, and modularized the instrument units and components, which made the maintenance replaceable.

Wenzhou Branch has five unique patented design technologies in China:

1: external gradient elution technique. Precise control of proportional valve makes gradient elution of 65438 0% possible, which is 20 times higher than the industry standard.

2. The design of the four lenses in the flow cell makes the pressure resistance reach 120kg, which eliminates the shortcoming that the flow cell of other instruments is easy to leak.

3. Design of back pressure device. Because of the unique back pressure device at the exit of the ultraviolet detector of the cell pressure-resistant temperature analyzer, bubble interference is no longer a problem.

4. The motor driving device adopts subdivided 2000-step driving motor, which makes the infusion pump have the highest flow accuracy, the smallest pulsation and the smallest mechanical noise.

5. Optical elements such as optical unit, deuterium lamp and flow cell are integrated and in a state of thermal balance, so that the service life of deuterium lamp can reach more than 2500 hours, while other manufacturers (including international brands) only promise an average of 1000 hours.

2. Made by Beijing Wenzhou Branch:

Based on the leading, complete and reasonable R&D design concept. In manufacturing, Beijing Wenzhou Branch strictly follows the scientific production process, selects the best quality purchased parts and the most precise processed parts, carefully assembles them, conducts comprehensive debugging and testing, and passes three strict inspections before leaving the factory. The strict control system and high sense of social responsibility from the smallest parts to the whole machine make the qualified rate of thermometers reach 100%. Since the establishment of the company, all kinds of state administrative organs and users, large and small, have all kinds of testing and temperature measuring instruments, which have always been comprehensive and excellent. There has never been a case of unqualified inspection. Because the writer knows that the defect of the manufacturer 1% is the fault of the user 100%. The liquid chromatograph of Beijing Wenfen has kept all the qualified start-up and installation records. In frequent instrument comparison experiments, some users often compare thermometers with instruments of famous foreign brands, and the results are comparable.

Ensure that the components that determine the performance index are the best imported components in the world. For example, the main index that determines the infusion pump is the maximum pressure index. The sealing system components of Wenzhou Branch are all imported from the United States, while the motor drivers that determine the flow stability and flow accuracy are imported from Japan. The pulsation damper for determining pulsation is a patented design of Wenzhou Branch. The deuterium lamp, photocell, monochromator and flow cell of the detector are all imported from Japan, which ensures the absolute lead in baseline, noise and repeatability.