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Wednesday, September 07, 2022

Quercetin Dihydrate Product Name: Quercetin Botanical Name: Sophora japonica L. CAS No: 117-39-5 Molecular Formula: C15H10O7 Molecular Weight: 302.24 Color: Yellow-Green powder Used Part: Flower Bud Purity: 95% HPLC Description: Quercetin is a type of plant-based chemical, or phytochemical...

Friday, July 29, 2022

About Company Qyherb is devoted on the extraction of effective natural ingredients from natural Chinese herbal medicines, and natural plants with 15 years of produce experience. We focus on the natural ingredients and plant extract applied to food, functional products, dietary complement...

Wednesday, May 18, 2022

Quantity : 15000 piec - Price : $5-100

It' s extracted from the root of Angelica by SFE-CO2 Extraction. According to traditional Chinese medicine, Angelica has the role of nourishing blood, nourishing bowel and defecation. It is suitable for symptoms such as blood deficiency, dizziness and palpitation, irregular menstruation...

Wednesday, May 18, 2022

Quantity : 15000 piec - Price : $5-100

It's extracted from the root of Angelica by SFE-CO2 Extraction. The main component is ligustilide, linoleic acid, etc. It is currently the best-selling pharmaceutical intermediate and healthy food raw materials in the market. Angelica root essential oil is also widely used in cosmetics...

Tuesday, April 12, 2022

The fast switching solenoid valve is a type of multiposition valve without a public port but with dispensing ports around, a sample loop is required for such kind of valve to create a metering specific volume of fluids for a lab test, the applications are very flexible as you can...

Monday, August 02, 2021

What is glabridin? Glabridin, also known as Glycyrrhizic Flavone, is an kind of isoflavone. It is extracted from the dried rhizome of Glycyrrhiza glabra L. Glabridin is one of the main flavonoids in Glycyrrhiza glabra (accounting for 11%). Numerous studies have shown that Glabridin...

Monday, August 02, 2021

Rutin is extracted from dried buds of Sophorae Japonica. Pure rutin is yellow or yellow-green colored needle-shaped crystal. Rutin is a flavonol glycoside comprised of the quercetin and the disaccharide rutinose. Rutin is a powerful antioxidant. It helps the body utilize vitamin C...

Monday, August 02, 2021

Basic info: Product Name: Ginkgo Biloba Extract Latin Name: Ginkgo Biloba L. Product Type: Light Yellow or Brown-yellowPowder Part of the Plant Used: Leaf (Dry, 100% Natural) Extract Method: Ethanol & Water CAS#: [90045-36-6] Ginkgo biloba Extract specifications: 1. CP2005 (Ginkgoflavon...)

Monday, August 02, 2021

Stevia (Stevioside, Rebaudioside A) is natural and derived from the leaves of stevia plant, it does not contain any harmful chemicals often found in artificial sweeteners. Stevia is safe for diabetics, has been shown to help prevent tooth decay, and has even been recommended by the...

Monday, August 02, 2021

Hesperidin is a flavanoneglycoside found abundantly in citrus fruits. Its aglycone form is called hesperetin. Its name is derived from the word "hesperidium", the kind of fruit produced by citrus trees. Hesperidin is believed to play a role in plant defense. It acts as an antioxidant...

Monday, August 02, 2021

Carnosic Acid 20% Carnosic Acid 50% Carnosic Acid 60% Carnosic acid is a phytochemical that occurs naturally in rosemary, the common culinary herb. Recognized as an antioxidant, the most notable benefit of carnosic acid is its ability to protect against free radicals in the brain...

Wednesday, April 08, 2020

Importance of Proper Models of HPLC Column In practical application, proper models of the HPLC column have a great influence on the performance or operation of the HPLC column. Improper models could greatly reduce the filtration effect. The HPLC column of high purity silica gel matrix...

Wednesday, April 01, 2020

The properties of the reversed-phase filler are determined by the matrix and the substrate. the particle shape, size, pore size and pore size distribution of the matrix, specific surface area, residual silicon hydroxyl concentration, and the content of impurity ions will all have...

Wednesday, March 25, 2020

Character of syringe filter 1. The PTFE membrane of the syringe filter is completely made of natural and permanent hydrophobic PTFE material. Even under a very low pressure difference, it can ensure that moist air or other gases can pass without hindrance, while the aqueous solution...

Tuesday, March 24, 2020

Remove the column outlet end If the pressure does not drop, the HPLC column is blocked. Treatment: if the buffer salt is blocked, flush 95% water to normal pressure. If some strongly retained substances cause blockage, the mobile phase stronger than the current one should be used...

Monday, March 23, 2020

Advantages of flash column FLASH chromatography is used for preparation and has the following advantages: 1. Fast speed, generally 1/8 of the separation time of open column chromatography, saving time, slow sample change and decomposition 2. Large preparation volume, at least as compared...

Wednesday, March 18, 2020

Widely used to remove particles from a liquid sample and avoid damage to equipment at the same time, syringe filter is affordable tool in the labs, which the scientists can use for small-volume filtration. You can find two different types of filters, one is with which you can recover your sample...

Tuesday, March 17, 2020

Cleaning and storage of HPLC column Have a good understanding of the sample made, and wash it with the mobile phase that has the strongest eluting capacity for the sample. For silica gel HPLC column, first wash away the polar impurities with methanol, then use dry dichloromethane...

Tuesday, March 17, 2020

How to understand the chromatographic separation? Put it in short, the more similar the separated substance to the stationary phase, the longer the residence time on it. In this way, different substances in a complex mixed solution can be separated according to time, and the separated...

Thursday, March 12, 2020

What areSyringe filter syringe filters used for? syringe filter, also known as needle filter, cylinder filter, cylinder filter membrane filter, etc., is used for sample prefiltration, clarification of the removal of particles, liquids and gases, etc. What are the advantages of using...

Tuesday, March 10, 2020

Types of HAWACH HPLC Column There are 2 kinds of HAWACH HPLC columns: Xcheoma series: with many types of fixed phase; with complete varieties and high quality. C18-Aqueous; C18-universal;C18-low pH; C18-Alkaline; C8-universal; C8-Low pH; C8-Fluorine; C4; C30; C1;Phenyl; PAH; etc Echroma series...

Tuesday, January 21, 2020

Syringe filter is separation equipment which can be combined with a injector to filter out the impurities from the sample of chemically turbid solution. Syringe filter generally consists of a plastic housing and a membrane. The body of syringe filter (plastic housing) is usually made...

Monday, January 20, 2020

1. Why does the retention time sometimes drift and sometimes change rapidly when analyzed by HPLC? How to solve it? About drift ① The temperature control is not good. The solution is to use a constant temperature device to keep the HPLC column temperature constant. ② The mobile phase...

Friday, January 17, 2020

Vacuum filtration system is a kind of vacuum filtration device, which ingeniously combines all the components needed for Vacuum filtration on one body, saving space and simple operation. It is widely used in laboratories, including various microbial tests in food, medicine, beverage...

Tuesday, January 14, 2020

The sample shall be dissolved as much as possible in solvents that are mutually soluble with the mobile phase. Except for special designation, the resolution of the sample HPLC column may be reduced if it is dissolved using a strong solvent. Besides, the sample solution shall be pre-filtered...

Tuesday, January 07, 2020

Hawach HPLC column is composed of a column tube, pressure cap, clamping sleeve (sealing ring), the screen plate (filter), joint, screw and so on. The column tube is made of stainless steel. When the pressure is not more than 70 kg/cm2, thick-wall glass or quartz tube can also be used...

Friday, January 03, 2020

Operation of HPLC Columns In daily separation analysis, it is significant to properly use column, or the service life of the column efficiency of it can be directly affected. In the course of column loading, unloading or replacement, strong mechanical vibration should be prevented...

Friday, December 13, 2019

High-perfor mance liquid chromatography (HPLC) was developed on the basis of classical liquid chromatography and introduced gas chromatography theory in the late 1960s. It differs from classical liquid chromatography in that the filler particles are small and uniform, and the small...

Wednesday, December 11, 2019

The HPLC reversed-phase column is made of high-purity and high-strength silica gel by using advanced bonding technology. It has a high surface bonding rate and good peak shape for alkaline and acidic compounds. With a high column capacity and long service life, it is the one for the...

Wednesday, December 11, 2019

Syringe filters are used in a wide range of laboratories to provide fast and efficient water and organic solution filtration solutions. It is made from a variety of membrane filters containing polypropylene housings, and special injection molding processes increase burst pressure...