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…
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…
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…
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…
When the injection volume of test substance within the range of the security, changing injection volume will affect the peak height and peak area accordingly. But the influence of retention time, peak width, and resolution is slight. When injection volume or the quality is excessive, it will cause the overload phenomenon. With the peak width increases, Read more…
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 chlorophyll and other interfering substances, then separate vitamin K1 from other impurities with C18 LC column After zinc being reduced, Read more…
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 prevention and control of infectious diseases. It is also an effective means for families to reduce the incidence of diseases among members Read more…
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, or the separation degree is too poor. In this case, gradient elution can shorten the analysis time and improve the separation effect. Let’s Read more…
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 protein from the complex mixture until now. Here we would like to share with you the current popular methods of protein separation. Method of Read more…