Q&A for SPE Column

Solid phase extraction (SPE): also known as liquid-solid extraction. It refers to the process in which the analyte in the liquid sample is retained on the adsorbent by adsorption and then eluted by a certain solvent. SPE method is a separation technology which combines selectively retention and selectively elution, mainly used Read more…

SEC (Size Exclusion Chromatography)

Overview SEC (Size Exclusion Chromatography) is a technique that separates molecules of interest by their molecular size.  There are 2 types of SEC separation known as Gel Filtration Chromatography (uses aqueous solvents) and Gel Permeation Chromatography (uses organic solvents).  Both types of SEC use a variety of different types of Read more…

CPhI China 2020

In the end of 2020, the 20th CPhI China 2020 rounded off. As one of the exhibitors,  we’d like to review the highlight of Welch in this exhibition with you. In spite of the freezing cold in Pudong, Shanghai, the attendees’ enthusiasm poured our booth. During these three days, many people were attracted by our products and Read more…