News
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Distinction of Related Concepts About Liquid Chromatography
High performance liquid chromatography (HPLC) is a fundamental analytical discipline with many similar concepts. Therefore, it’s necessary for us to learn how to distinguish some easily-confused concepts of liquid chromatography.... -
The principle of 100% water compatible column
There are many kinds of C18 columns in the market, some are 100% water compatible, some are not. Why can they be used at 100% water? How to distinguish? What... -
Chiral Separation of Remdesivir Isomers
2019-nCoV corona virus pandemic is exploding all over the world, how to cure it has become the most important and urgent matter at present. Remdesivir, developed by Gilead, which is... -
New Product: Ultisil® Amino Acid Plus Column
New Product Release The overall polarity of amino acid molecules is larger for the reason that molecules contain both carboxyl group(-COOH) and amino group (NH2) . If analyzing with conventional... -
Ultisil® OAA for Organic Acids Detection
Ultisil® OAA Special HPLC Column for Detection of Organic Acids What is the organic acid? Organic acids refer to some acidic organic compounds of whom molecules are usually with acidic... -
Pittcon 2020, We are here!
Pittcon 2020 Pittcon 2020 was held in Chicago, Illinois at McCormick Place from March 1-5. It is the seventh time for Welch to attend Pittcon. Pittcon is the world’s leading... -
Welch Attended ASIA PHARMA EXPO 2020 in Bangladesh
Welch Materials attended ASIA PHARMA EXPO 2020 in Bangladesh at 28th Feb–1st Mar. As Bangladesh's largest exhibition in the aspect of pharmaceutical machinery and technology, ASIA PHARMA EXPO 2020 attracted... -
Welch US subsidiary has Moved to a New Office!
We are proud to announce that our US subsidiary has moved to a new location in West Haven, CT. We spent the previous few years in finding an appropriate place... -
Analytica Latin America 2019
Welch Materials attended Analytica Latin America 2019 in Sao Paulo at 24-26th Sep. Welch Booth Analytica is one of the main global gathering places for the chemical and analytical industry.... -
Hard to separate polycyclic aromatic hydrocarbons? Use Wisys 5000
◆ ◆ ◆ ◆ Why to separate polycyclic aromatic hydrocarbons? Polycyclic aromatic hydrocarbons are volatile hydrocarbons produced when coal, petroleum, wood, tobacco, organic polymer compounds and other organic substances are... -
How to distinguish Guard column and Pre-column Inline Filter?
Guard column and Pre-column inline filter are commonly used in LC experiments. But a lot of users are confused about the two products as they look similar. How to distinguish?... -
Why is there always a "ghost" in your chromatogram?
What’s Ghost Peaks? In the chromatographic separation, there are some peaks which appears erratically like ghosts during gradient elution or long-period operation, we call them Ghost Peaks. The harm of...