News
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How to Select a Suitable Column?
When you look up the pharmacopoeia method, you may find that it only stipulates the bonding phase of column and the information of other columns is not available. Therefore, you... -
Solid Phase Extraction(SPE)
Solid Phase Extraction Cartridges Over the last twenty years, SPE has become the most powerful technique prior to analytical chromatography for the cleanup, purification, and concentration of samples from various... -
Methods for Prolonging the Column Lifetime
Your column may suffer from short working life, which not only causes rising costs, but also impacts the experimental results. Today, we invite Welch engineers to answer questions about how... -
Knowledge for SPE Method Development
Mechanism of reversed-phase: Reversed-phase extraction separation mainly uses the non-polar force between C-H bonds on SPE functional groups and C-H bonds of target compounds. In general, non-polar reversed-phase SPE columns... -
Determination of Vitamin K1 in Food
Range of Application and Principle Extract vitamin K1 from low fat plant samples such as fruits and vegetables with isopropanol and n-hexane. Purify Vitamin K1 by prep column and remove... -
Address the Problem of Vaccine Purification
Vaccines, as a hot word in 2020, will be frequently referred for a long time in the future. Vaccination is the most economical and effective public health intervention for the... -
Gradient Optimization of Liquid Chromatography
In liquid chromatography, for samples with complex components, it is often difficult to use a single chromatographic system to achieve ideal separation effect. Either the separation time is too long,... -
Separation Method of Protein
Proteins exist in tissues or cells as complex mixtures and each type of cell contains thousands of different proteins. However, there is no single method can remove any type of... -
Remove harmful metal ions? Welchrom® Thiol brings help
In the field of pharmacochemistry, the residues of toxic metals in active organisms and active pharmaceutical ingredients are the focus of many experts. In addition, other products also have very... -
Gel Purification Chromatography
Gel Purification Chromatography Gel chromatography is a separation and analysis technology developed in the early 1960s. According to whether the separated objects are water-soluble substances, gel chromatography can be divided... -
Flushing and Regeneration of Reversed-Phase Column
Do you know the maintenance methods of Welch columns? Some people may use the wrong way to flush columns unconsciously, so it is recommended to learn some practical methods for... -
How to Maintain Our Non-Reversed Phase Columns?
Pollution, loss and other problems will inevitably appear during the use of HPLC columns, thus it is necessary to flush column for maintenance at that time. From the point of...