Determination of Cis-trans Isomers in Vitamin K1

Vitamin K1, also known as the plant methylnaphthoquinone, chlorphenoquinone, chlorphenoquinone, 2-methyl-3- phytol-1,4-naphthoquinone, is a polycyclic aromatic ketone and fat-soluble vitamin. Extensively existing in natural green plants, Vitamin K1 is stable in the air and moisture, but it will be decomposed in the sun. As the necessary substance for liver synthesis factors II, VII, IX, X, Read more…

Welchrom® Immunoaffinity Column

Welchrom® Immunoaffinity Column is used to separate and purify mycotoxins from samples based on specific reactions between antigens and antibodies. Antibodies in the immunoaffinity column suspend in the gel by covalent bonding and specifically adsorb the mycotoxin in the sample. If the sample being tested contains the mycotoxin, the toxin Read more…

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…

Lab Assistant (Part A)

In the process of doing experiments, it is inevitable to use some instruments to accelerate experiments and accomplish tasks that can not be accomplished by hand. So some useful experimental instruments can be recommended as follows. Visual Termovap Sample Concentrator The termovap sample concentrator is mainly used for the concentration Read more…