News
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Isomer Separation? Try Chiral columns
Isomers are compounds with similar structures and their chemical equilibrium constant(K) is almost the same. It’s very difficult to operate chromatography separation on isomers, especially the separation of meta and... -
Welch in CPhI China 2019
The 19th CPhI China was held on 18th June, 2019 and it lasted three days. It’s the ninth time for Welch to attend CPhI China. Welch has obtained great progress... -
An invitation to CPhI China 2019 from Welch Materials
CPhI China 2019 will be hold from 18th-20th June, 2019 at Shanghai New International Expo Centre. Why CPhI？ CPhI China 2019 is the gateway to successfully grow business at the... -
Hot Wire: Welch Headquarter moves to Tus-Caohejing Science Park
We are pleased to announce that our headquarter will be relocated to the following address as of June 5, 2019: Building 10, Zijing Park, Tus-Caohejing Science Park, No. 85 Mingnan... -
Oxidative damage in GC column
Oxygen is a hazardous substance for most of the capillary columns. At room temperature, the column will not be damaged. But as the column temperature increases, the column will be... -
Core-shell column：get high efficiency at low pressure
Superior core-shell column There are mainly two kinds of chromatographic packing materials: silica gel and polymer. Their structural difference makes maintenance and separation results different. Silica based packing materials contain... -
Amino(NH2) column: How to keep high performance?
When use the amino((NH2) column for a period of time, do you encounter a decrease in column efficiency and an increase in column pressure？Or abnormal interference peaks and the retention... -
Welch columns were included in the database of USP-PQRI
Column selectivity database(USP-PQRI) The United States Pharmacopoeia (USP) is a recognized statutory public standard setting agency in the United States of America. USP develops quality standards for prescription and OTC... -
Batch to Batch Reproducibility? The solution is here!
Today we will bring “Solutions to solve poor reproducibility between batch to batch”. Q How to ensure good reproducibility when a new validated HPLC method is transferred to Q.C. lab?...