Chromatographic pump maintenance knowledge

To maintain good pump performance, the system must be clean, solvent and reagent quality guaranteed, and the mobile phase filtered and degassed. Here are a few precautions to prevent pump failure: 1. High quality reagents and HPLC grade Solvent; 2, filter the mobile phase and solvent; 3, degassing; 4, venting exhaust air every day when the start of use, washing away the buffer solution from the pump after the work; 5, do not let water or corrosive solvents remain in the pump; , Regular replacement of gaskets; 7, when necessary, add lubricants; 8, consult the pump operation manual for other suggestions. Pumps in good working order should be able to stabilize the baseline on the chromatogram; reproducibility of retention time is good. Fluctuations in isocratic elution are less than 2%. Gradient elution pressure changes should be slow and steady. In order to rule out the failure as soon as possible after the failure, usually should be standing seal, check valve (inlet and outlet), pump head device, all kinds of fittings, fuses and other components, and replacement tools.

Ceiling Fan

Modern embedded ceiling fans of LEDER technology are equipped with low-noise wind motors, which can keep you and your family away from any noise interference, create a comfortable and quiet living environment, improve sleep quality, LED lights are energy-saving and environmentally friendly, low power consumption, and can save large electricity bills. The high transmittance lampshade with a bamboo tube-shaped light hole, when you turn on the light, you will feel yourself in nature. Beautiful and durable, transparent abs fan blades, very good and very practical.

The ceiling fan adds rustic charm and a cooling breeze to any room. The fan is designed to push air down into the room, where you live. The included led bulbs are long-lasting, deliver plenty of light using the included remote control. Multifunctional modern ceiling fan with light, Inserted with high-quiet copper motor, brings your comfortable living and sleeping experience. 3 speeds (Low-Mid-High), 3 color changes (White-Warm-Yellow), all these functions can be easily controlled by remote.

Features:

• Beautiful and durable

• Not suitable for outdoor use

• Reasonably price

• Energy saving

• Contracted design

• Color temperature :3000k-6000K

• Wind adjustable

• Type of protection: IP20

• Warranty for bulbs :2 years

The modern and simple style ceiling fan with light is perfect for Indoor Lighting, bedroom, dining room and so on, but we do not recommend for outdoor use.

We have rich production experience in lighting.Except ceiling fan , we also offered other product in indoor lighting .Such as :

LED Panel Light , Track Light , Linear Light ,Wall Light , LED Strip Light , LED Tube Light , Cabinet Light , LED Bulb , LED Ceiling Light as so on .

Smart Ceiling Fan,Cheap Ceiling Fans,Large Ceiling Fans,Black Ceiling Fan

JIANGMEN LEDERLIGHT LIGHTING Co.,LTD , https://www.ledpaintlight.com