CHROMATOGRAPHY - 288 ads

Wednesday, March 18, 2020

Flash column is usually used for the chromatography experiment to separate the complicated compounds by pressurizing air. The hot air enters the stirring, crushing and drying chamber from the bottom of the dryer at a suitable spraying speed from the inlet pipe, which produces strong...

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...

Sunday, March 15, 2020

Quantity : 200MT/mont - Price : 30 USD/Kilogram

Classification. Organic Acid Refractive index.1.3 Cas NO.: 76-05-1 Flash Point: -3 oC Molecular Formula: C2HF3O2 Purity: 99.5% Melting Point: -15%C Appearance: clear liquid Boiling Point: -15.4 °C usage: industrial and medical use Stbilty: Stable. Incompatible with combustible material...

Saturday, March 14, 2020

Quantity : 5000 ton/p - Price : ＞0.8USD

Product description Bright Annealed Tubes Description Bright annealed stainless steel tube is a kind of high precision steel tube material after finishing or cold rolling. Due to the advantages of no oxide layer both inside and outside wall, no leakage under high pressure, high precision...

Thursday, March 12, 2020

Most filter paper is made of cotton fibers and is made in different ways for different purposes. Because it's made of fiber, As a result, its surface has numerous small holes through which liquid particles can pass, while larger solid particles cannot. This property allows the mixing...

Wednesday, March 11, 2020

Column chromatography is found important in the labs due to its factors of easy packing procedure, low pressure of operation and low costs as well. Depend on the way that the solvent flows down the column, we can find two different kinds of column chromatography: one is gravity column...

Tuesday, March 10, 2020

1.Mixed-mode cation exchange r: A mixed adsorbent having strong cation exchange and reverse retention, which is highly selective for alkaline analytes, stable in organic solvents. 2.Weak cation exchanger: Weak cation exchange and reverse retention complex mechanism, which is used...

Tuesday, January 21, 2020

The FLASH column is the heart of the FLASH purification system, like an engine in a car. If you want to do a good job, you must first sharpen the tools. Choosing the correct FLASH purification column is the most critical part of the whole purification process. And choosing the right...

Thursday, January 16, 2020

Highlights of HAWACH flash column HAWACH flash column is packed with proprietary technology for automatic packing. The column bed is compact and uniform, has no “ditch flow effect”, with high resolution and good reproducibility. Different particle sizes of normal phase and reversed-phase...

Friday, January 10, 2020

When selecting the filter paper, people should combine the Rf value of the separated object. For the compounds with slight differences in Rf values, slow filter paper can be used to separate the compounds clearly because using the fast filter paper will cause the inseparable weight...

Friday, January 03, 2020

The vacuum filters are mainly applied for filtration of mobile phase of High-Performance Liquid Chromatography, particulate and microbiological contamination. They are the basic instruments in the chemistry lab. Particularly, the glass solvent filter can make filtration of all kinds...

Friday, December 13, 2019

FLASH column is a sample pretreatment technology developed by the combination of liquid-solid extraction and column liquid chromatography. It is mainly used for sample separation, purification and concentration which has been widely used in medicine, food, environment, commodity inspection...

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...

Thursday, December 12, 2019

QuEChERS is a streamlined technique that makes it easier and cheaper for analytical chemists to examine the pesticide residues in agricultural products. It is exploited by many professors of the American Ministry of Agriculture in 2003, especially Anastassiades. This technique shares...

Thursday, December 12, 2019

As a unique chromatography technique that pushes solvent through the column uses by compressed gas or a pump, flash column chromatography is highly appreciated as an advance technique because it makes flow rates of the solvent much faster than the gravity flow. Developed in the 1970's...

Thursday, December 12, 2019

Because the cotton fiber in the filter paper has a good affinity with water, it can absorb about 22 percent of the water, in the form of a hydrogen bond with cellulose water has 6 to 7 percent. In general, it is very difficult to remove. Compared with the affinity with water, 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...

Wednesday, December 11, 2019

Flow Process of HPLC column First, the solvent in the storage bottle is pumped into the chromatographic system by pump and then output, and then introduced into the sampler after flow and pressure measurement. Second, object to be tested is injected by the sampler, passes through...

Wednesday, November 13, 2019

Quantity : 5000 ton/p - Price : ＞0.8USD

Product description Bright Annealed Tubes Description Bright annealed stainless steel tube is a kind of high precision steel tube material after finishing or cold rolling. Due to the advantages of no oxide layer both inside and outside wall, no leakage under high pressure, high precision...

Saturday, October 12, 2019

It is well known that each laboratory has a large number of samples to be tested by liquid or gas chromatography. Consequently, there are lots of sample vials that need to be cleaned during the test even though it's time-consuming. Since the cleanliness of the vials may affect the test results...

Saturday, October 12, 2019

The stationary phase, commonly known as the fillers, is the most central part of chromatography. People need to determine three aspects of stationary phase information in turn before determine how to select the kind of the stationary phase of the flash purification column. They are matrix type...

Thursday, October 10, 2019

The essence of the chromatographic process is the process of distributing the equilibrium of the molecules of the substance to be separated between the stationary phase and the mobile phase. The distribution of the different substances between the two phases will be different, which...

Wednesday, October 09, 2019

Flash column chromatography is an easy and fast method to separate the complex mixtures. It can not only make the separation effect better but also shorten the time. How to put the sample into the flash column is of high importance in the preparation process of flash column chromatography...

Wednesday, October 09, 2019

Solid phase extraction (SPE) is used to reduce sample matrix interference and improve detection sensitivity. The separation selectivity of the solid phase depends on the retention strength of the components that can be retained, so the selection of the solid phase will depend on the...

Tuesday, October 08, 2019

The essence of the chromatographic process is the process of distributing the equilibrium of the molecules of the substance to be separated between the stationary phase and the mobile phase. The distribution of the different substances between the two phases will be different, which...

Monday, September 30, 2019

Syringe filters are widely used in the laboratory. They do not need to change membranes and clean filters, thus eliminating complex and time-consuming preparations. It is mainly used for sample pre-filtration, clarification and bacterial filtration of particles, liquids and gases...

Monday, September 30, 2019

Features of Sample Vial Sample vial supplied by Hawach has its special merits, concretely speaking, our company always has a keen sense of smell to the market, keep continuously improve our product quality and production efficiency. Whole sample vials are featured in good quality control...

Monday, September 30, 2019

SPE is a kind of sample production technology which is more and more useful in which many problems related to liquid and liquid extraction could be avoided, such as the incomplete separation, non-quantitative recycle, the use of expensive and fragile glass vessels, massive organic...

Sunday, September 29, 2019

Hawach glass solvent filter is made of high-quality borosilicate glass, which can be used to filter various aqueous solutions, organic substances, and corrosive liquids. The glass Solvent filter is available in one liter and two liters and consists of a triangular liquid collection bottle...

Sunday, September 29, 2019

There are many types of chromatographic methods, and different classification methods can be used from different perspectives. Classification from the state of two phases. In the chromatography, the mobile phase may be a gas or a liquid, and thus can be classified into gas chromatography...