HPLC - 407 Annonces

Mardi 09 juillet 2019

The cleaning of sample vial is very important. Usually, according to the principle of glass instrument washing and the degree of pollution to choose cleaning methods, there is no fixed mode. The specific methods are as follows: Method one: 1. Dry the sample in the sample vial. 2...

Mardi 09 juillet 2019

The reversed-phase HPLC columns may be repeatedly injected into a sample containing a strongly retained material, and in particular, the sorbent components such as large molecular weight or hydrophobic biological flow proteins and strong alkaline substances may be adsorbed on the silica medium...

Lundi 08 juillet 2019

QuEChERS is a pretreatment that has the characteristics of Quick、Easy、Cheap、Effective、Rugged and Safe, which is the reason why it is becoming more and more popular in the new testing methods. It was developed by Professor Anastassiades in 2003, which was used in agricultural testing at first...

Lundi 08 juillet 2019

SPE Technique Introduction SPE(Solid-phase Extraction), is an increasingly popularized technology of sample pretreatment, which is established on the basis of traditional LLE(Liquid-liquid Extraction). Combined with the substance interaction mechanism that like dissolves like, and...

Lundi 08 juillet 2019

Nowadays customers are now more concerned with the quality of the filter, especially the extractable level of the filter media. A low backgrounding and super clean filter media with no or extremely low HPLC extractables can keep the experiment without unwanted column peak. In Hawach Scientific...

Lundi 08 juillet 2019

HPLC is the separation of sample components between the column packing and the mobile phase for mass exchange. Therefore, the mobile phase is required to have the following characteristics: a. the flow relative to the sample has a certain solubility, to ensure that the sample components...

Vendredi 05 juillet 2019

When the polarity of the stationary phase is greater than the polarity of the mobile phase, it can be called normal phase partition chromatography or simply normal phase chromatography. If the polarity of the stationary phase is less than the polarity of the mobile phase, it can be...

Jeudi 04 juillet 2019

C8 HPLC columns are used to isolate many organic compounds, which are one of the reversed phase silica gel columns. The maintenance of C8 HPLC columns requires organic solvents. Chromatographic grade methanol is recommended and different brands of chromatographic columns should be...

Jeudi 04 juillet 2019

The silicon hydroxyl group with strongly polar on the surface of glass sample vials will adsorb the samples. Based on such reasons, people produce hydrophobic glass surface through silylating the sample vials in order to eliminate the adsorption of the sample vials, which is widely...

Jeudi 04 juillet 2019

(1) When loading and unloading or replacing the HPLC columns, the action should be light and the joint should be tightened properly. Strong mechanical vibration must be prevented to avoid voids in the bed. (2) If the instrument is used for routine analysis, the sample type is limited...

Mercredi 03 juillet 2019

The FILTSTAR series syringe filter is extremely low HPLC extractable and specially designed to support the filtration of viscous samples, hard-to-filter samples which with high solids content. Medical PP housing with imported membrane filter media helps to guarantee the filter cleanness...

Mardi 02 juillet 2019

In this article, we want to clarify the syringe filter. Each of the different syringe filters is applied to the specific product Which the various syringe filter is worth seeing more and what are the right steps and methods to have a try. Classification by membrane The filtration...

Mardi 02 juillet 2019

The key to regenerating contaminated HPLC columns is to know the nature of the contaminants and to find the right solvent to remove. If contamination is caused by the accumulation of strongly retained materials during repeated injections, simple steps to remove these contaminants...

Vendredi 28 juin 2019

Stationary Phase & Mobile Phase The stationary phase is used to separate the substances, which is packed into HPLC Column directly; Mobile phase is the carrier, which carries the substances into the stationary phase and goes through the stationary phase. It is gas in the vapor phase...

Vendredi 21 juin 2019

We can always hear such a conversation between those researchers. “Hey, buddy, what is your purity degree of the end products today?” “Damn it. Such a low degree that I cannot even use for the next step. Any better methods for clarifying raw materials?” Then there comes Hawach syringe filter...

Vendredi 21 juin 2019

Flash chromatographic column, also called rapid chromatographic column(rapid column crossing, which means gradient elution, decompression or pressurization of the column), medium pressure chromatographic column（for example, rapid elution is achieved by pressurizing with nitrogen and...

Vendredi 21 juin 2019

The cation chromatography column is a kind of high-performance liquid chromatography, which is a liquid chromatography method for analyzing anions and cations. The method has the advantages of good selectivity, sensitivity, rapidity, and simplicity, and can simultaneously measure...

Mercredi 19 juin 2019

Hawach Scientific sorts HPLC out of two series which are Xchroma and Echroma. Xchroma columns possess many and complete types of stationary phase(23 in total) with reliable qualities, while another one is cheaper among lower prices. Essential Technical Parameters Naming Rule It consists...

Vendredi 14 juin 2019

Hawach introduced the properties and application range of HPLC column stationary phase in the silica gel matrix. Silica gel matrix: Silica gel, weakly acidic, has a strong memory, used to separate non-polar, weakly acidic compounds, oils, etc.; C18, a silica-based uncapped reversed-phase...

Jeudi 13 juin 2019

NH2 HPLC columns can be used in the positive phase or in the negative phase, but it should be noted that the positive phase solvent and the negative phase solvent are usually not mutually soluble. New NH2 HPLC columns are preserved in the positive phase environment under normal circumstances...

Jeudi 13 juin 2019

It's important to know the way to choose the right syringe filter for filtration. And the membrane materials used for manufacturing syringe filters often determine your choices. Let's learn the different types of membrane materials for filtering in the lab. As the most popular membrane...

Mardi 11 juin 2019

The installation of the HPLC column should be carried out in the following three steps: a. Unpack the HPLC column and confirm the type, size, date of manufacture, and solvent stored in the column. b. Unscrew the sealing plug from the joints at both ends of the column and put it back...

Vendredi 07 juin 2019

Syringe filters are one of the types of filters. The structure design of the syringe filter is precise and the liquid is filtered smoothly. Internal space design is reasonable, so the residue rate is very low. In addition, the syringe filter has the following characteristics. Characteristics...

Jeudi 06 juin 2019

The empty column is assembled from column joints, column tubes, and filters. The HPLC columns joints are constructed with a low dead volume. The column joints are threaded assemblies at both ends, with 7/16-inch external threads on one end and 3/16-inch internal threads on the other...

Jeudi 06 juin 2019

As one of the useful sample preparation technique, solid phase extraction can prevent many problems, such as incomplete phase separations, recoveries with poor quantity, waste of expensive fragile glassware, and extra disposal of organic solvents, which you may occur if you use the...

Mardi 04 juin 2019

HPLC columns are manufactured and tested to exacting standards. If you use and maintain a liquid chromatography column with the following information, you will not only get better results but also extend the life of your HPLC column. Installation of HPLC columns: 1. First, check that...

Lundi 29 avril 2019

C1 HPLC columns are made of ultra-pure silica gel, unique stationary phase bonding technology. High column efficiency, good peak shape symmetry, wide pH range. C1 HPLC Columns Localisation : Xi'an City , Shaanxi Province, P.R.China, 710077 Xi'an, Personne à contacter : Bruce Lu, +86...

Mercredi 25 juillet 2018

Prix : Prix marché compétit

Basée en france, notre société commerciale est un pont entre deux continents et ne fait la promotion que des meilleurs produits d'origine d'ouzbékistan comme les fruits bio, les fruits secs, les produits textiles, plantes médicinales, la céramique et bien d'autres encore sur le marché français...

Mardi 10 avril 2018

Filtre à seringue spécialement conçu par Starlab Scientific avec des extractibles HPLC extrêmement faibles dans une salle blanche de 100 000 degrés. Tous les filtres fabriqués en Allemagne avec un boîtier en PP vierge de qualité médicale sont les plus faciles à extraire et à éliminer...

Mercredi 14 mars 2018

Quantité : 1kg - Prix : $520-625

- Epicatechine/epicatechin Bodybuilding CAS 490-46-0 - XI' AN LESEN BIOTECHNOLOGY CO., LTD specializes in the ten years of plant extracts and export trade, to provide customers with high-quality, organic, natural, good price of various plant extracts, fruit and vegetable powder...