News Editor

Over the rapid development of Welch Materials, Inc. for the past 20 years, our products have gained increasing recognition from customers, particularly our liquid chromatography columns, which have established a solid reputation among our extensive client base. As Welch chromatography columns gained popularity in the market, counterfeit products under the Read more…

As the application scope of gas chromatography continues to expand, there have been attempts to use high-temperature gas chromatography for the analysis of non-volatile compounds. For example, the petroleum industry requires the analysis of high-boiling point hydrocarbons (C>100). Liquid chromatography may not provide satisfactory sensitivity and cost-effectiveness for this analysis, Read more…

Non-aqueous reverse phase chromatography (NARP) is a special mode of reverse phase chromatography primarily used to separate highly hydrophobic samples that are insoluble in water, such as lipids and synthetic polymers. These samples have strong retention capabilities, and the mobile phase consists entirely of organic solvents without the use of Read more…

Zero Pressure in HPLC Analysis SystemWhat’s the Reason? How to Solve It? When conducting HPLC analysis, unstable column pressure Why? How to resolve it? 2. If the proportioning valve is malfunctioning, replacing the proportioning valve is recommended. 3. If the pump seal gasket is damaged, replacing the seal gasket should Read more…

High-performance liquid chromatography (HPLC) has become an important tool in modern separation and analysis due to its high selectivity, sensitivity, and fast analysis speed. The chromatographic column, as a crucial component of the HPLC system, determines the nature of the chromatographic system, while the particle size and length of the Read more…

Since its establishment in 2003, Welch Materials, Inc. has been committed to continuous innovation and serving our customers. Over the past 20 years, we have introduced groundbreaking liquid chromatography products. WelPrep2000 Liquid Chromatography System is our second-generation preparative liquid chromatography system. It covers a wide range of applications, from analytical Read more…

1 Related Terminology: Requirement: To remove impurities to the maximum extent possible without significant loss of the target compounds. Solvent selection: The solvent should be chosen to maximize the elution of the target compounds while minimizing co-elution of impurities. 2 Basic Principles The basic principle involves the selective adsorption of Read more…