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 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…
Vitamin B6, which includes pyridoxol, pyridoxal and pyridoxamine, is water-soluble in the form of phosphate in human body. As a component of some coenzymes in human body, it participates in many metabolic reactions, especially in amino acid metabolism. Clinical applicable vitamin B6 can prevent pregnancy vomiting and radiation vomiting. Yeast, Read more…
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…
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…
1. Application Range It is suitable for the determination of oil phthalate compounds (rapeseed oil is used as sample matrix in this experiment). Reference: SN/T 3147-2017 Determination of Phthalate Estates in Exported Foods 2. Extraction Steps 1) take 5 g samples in glass tube, add 2 mL acetonitrile saturated n-hexane, mix with vortex Read more…
Core-shell column shows high column efficiency, low back pressure, high sensitivity, but majority of people may not know the reasons. In order to understand the characteristics of the core and shell column, Van Deemter equation is recommended to know first. When we study chromatographic theory, rate theory is required to explain the broadening of peak. Read more…
1. Application range This standard prescribes a HPLC method for the determination of methylene blue residue in aquatic products. This standard is applicable to the determination and confirmation of methylene blue residues in fish, shrimp and their products. (The sample of this experiment is Longli Fish) Determination of Methyl Blue Residue Read more…
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…
Flash Column For organic synthesis and pharmaceutical chemistry, a largr amount of compounds should be sifted in the early stage. Once the related active compounds are found, it is necessary to purify this high added value compound. Using Flash column to purify is a common method during this procedure. There Read more…