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Miércoles 11 septiembre 2019

Flash chromatography is one of the methods in the preparation of liquid chromatography and is usually used for the separation of organic compounds. Flash chromatography has the advantages of ease of operation, low cost, and fast analysis. There are few other techniques for purifying...

Martes 10 septiembre 2019

1. Advantages and disadvantages of commonly used extraction solvents Acetonitrile: easy to salt out; compatible with LC/MS; difficult to concentrate Acetone: not easy to salt out; easy to volatilize, concentrate Ethyl acetate: immiscible with water; less extraction of impurities;...

Martes 10 septiembre 2019

Extraction thimbles are often used when you need multiple extraction cycles to dissolve the desired compound in the lab. Extraction units such as the Soxhlet extractors or automized extractors, equipped with extraction thimbles, can save time of handling and make the extraction complete...

Domingo 08 septiembre 2019

Auto Parts Description Parts made from sheet molding compound (SMC) are typically 25-35% lighter than steel parts and aluminum products of the same strength. The stroke is increased and the fuel consumption is greatly reduced. Auto Parts And Accessories Featurs • Stable shape: SMC's...

Sábado 17 agosto 2019

Cantidad : 500kg

The silicone rubber insulation coating is made from special silicone rubber, high-performance material and other polymers by polymer blending technology. Its basic structural unit is silicon - oxygen chain while its side chain is connected by silicone with another organic radical group...

Viernes 16 agosto 2019

Cantidad : 40HQ - Precio : 0.09-0.40USD/PC

We are professionally on manufacturing Multicolor Printed BOPP Laminated pp woven packaging bags which are precision produced by quality pp material that offers outstanding usage value. BOPP bags are new, advanced and attractive type of bulk packages from 5 kgs to 100 kgs. BOPP Bags...

Viernes 16 agosto 2019

NH2 HPLC columns refer to the chromatographic columns that use silica gel as matrix carrier to bond amino groups. They are usually used for the analysis of carbohydrate compounds, and the mobile phase is usually methanol, acetonitrile and buffers salt solution. - The cleaning method...

Miércoles 14 agosto 2019

Cantidad : 1 - Precio : 5,89 €

Michelle Chen CHONGQING LANREN ALUMINIUM CO., LTD NO. 23‐4, JIANGNAN AV.NANPING, NANAN DISTRICT, CHONGQING CITY, CHINA. 400060 Tel: +86‐23‐62912580 I Fax: +86‐23‐62603711 WhatsApp: +8615736215804 Email: lanren100@outlook.com www.lanrenaluminium.com I www.zglrmy.com Ubicación : No...

Miércoles 14 agosto 2019

Physical properties of the chromatographic column could affect the performance of C18 HPLC columns. - Performance factors of C18 HPLC columns: - Silica gel purity Class A silica gel has high residual silica hydroxyl with a negative charge and high metal content on the acidic surface...

Lunes 12 agosto 2019

The rapid chromatographic method is a technology widely used in the separation and purification of active target compounds, such as organic compounds, natural products, and biological macromolecules. Rapid chromatographic method has the advantages of easy-operation, low-price, and fast-analysis...

Lunes 12 agosto 2019

Solid phase extraction principle Solid phase extraction is a separation technique that combines selective retention, selective elution, and the like. When a complex sample solution passes through the sorbent, the sorbent selectively retains the aimed compound and a small number of...

Viernes 09 agosto 2019

As a matter of fact, the quartz fiber extraction cannot be accessible in China, so Hawach has to design the other two products—cellulose and glass fiber exaction thimbles whose relevant parameters are respectively introduced as follows. Cellulose Exaction Thimble It is composed of...

Viernes 09 agosto 2019

Reversed-phase chromatography (RPC) contains any chromatographic method using a non-polar stationary phase. The word “reverse” has a historical background. In the 1970s, most liquid chromatography was performed on unmodified silica or alumina. Their surface chemistry is hydrophilic...

Jueves 08 agosto 2019

More than 90% of gas chromatographic problems occur in the inlet, and it is necessary to see which problems may occur in the inlet. Problem No.1: Leak If there is a leak, the pressure on the inlet may not be maintained, and the instrument will alarm. If the problem cannot be solved in time...

Jueves 08 agosto 2019

Considering the comparative simplicity and maturity of the glass vial, customers rarely complain about its quality. However, the applicability of the autosamplers is actually essential to big manufacturing companies. Severely in terms of International Standard, vials of Hawach are...

Jueves 08 agosto 2019

Most common SPE cartridges are injection syringes made of polyethylene, in which there are two plugs made of polypropylene or fiberglass, with a certain amount of chromatographic adsorbent (filler) between the two plugs. SPE cartridges without sieve plate 1. Avoid “non-specific adsorption” 2...

Miércoles 07 agosto 2019

Food safety testing is a major issue related to people's livelihood. In recent years, the QuEChERS method has been widely used in the pretreatment of food safety detection samples. In addition, the method has been applied to trace analysis. QuEChERS Application The international application...

Martes 06 agosto 2019

Cantidad : 100000TM - Precio : 50USD

Application of Cyclohexanone It is the raw material for the production of caprolactam and adipic acid; used as the solvents and diluent agents of paints, inks, synthetic resins and synthetic rubber; also used as the leather degreasing agent. Used as the organic cyclohexanone solvent...

Martes 06 agosto 2019

HPLC is more suitable for the separation and analysis of substances with the high boiling point, poor thermal stability, physiological activity, and relatively large molecular weight. Hawach HPLC columns are widely used in the analysis of nucleic acid, peptide, lactones, polycyclic...

Sábado 03 agosto 2019

SPE cartridge can be divided into three classes on the markets: silica-based cartridges, polymer-based cartridges, and adsorption-based cartridges. And here we talk about the three types of silica-based cartridges. The first type is the C18 cartridges. This kind of cartridges bond...

Miércoles 31 julio 2019

Solid phase extraction (SPE), developed in the 1970s, can replace the traditional liquid-liquid extraction in many fields and has been applied more and more widely in the laboratory. The common solvent of SPE Hexane, isooctane, tetrahalide carbon, trihalomethane, dihalomethane, tetrahydrofuran...

Martes 30 julio 2019

The improper use of chromatographic columns will make the columns decrease or lose effectiveness. Generally speaking, the columns always have problems at the end of them. If we can install a short column with the same stationary phase as the analysis column in front of analysis column...

Lunes 15 julio 2019

The solid phase extraction cartridges (SPE column, or Solid Phase Extraction Cartridges, or SPE cartridges for short) is a sample pretreatment device for extraction, separation and concentration developed from a chromatography column. Mainly used in sample pretreatment of various foods...

Viernes 12 julio 2019

Cellulose Exaction Thimble For the cellulose exaction thimble (CET), parameters are mainly focused on the constitution, heating temperature. CET is usually made out of high-grade cellulose or seamless noble cellulose and lines of cotton, excluding any binding elements, which means...

Jueves 11 julio 2019

SPE column or SPE cartridges are based on liquid-solid phase chromatography theory, it is a kind of extraction, separation, concentrated sample preparation unit. Mainly used in sample pretreatment of various foods, agricultural and livestock products, environmental samples and target...

Martes 09 julio 2019

Polymeric MCX SPE cartridges are used to extract strongly alkaline compounds. MCX is a mixed strong cation exchange adsorbent obtained by bonding sulfonic acid groups on highly crosslinked PS/DVB surface. It has both reverse phase and cationic exchange retentive properties and good...

Lunes 08 julio 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...

Lunes 08 julio 2019

As a simple and fast absorption chromatography technique for the routine purification of organic compounds, flash chromatography is developed for the daily purification of reaction products in the lab, which is low costs and achieves separations of samples (0.01-10.0 g weight) in short time...

Jueves 04 julio 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...

Jueves 04 julio 2019

The filler of polymeric HLB SPE cartridges produced by a special copolymerization technology contains a certain proportion of the hydrophilic group and the hydrophobic group. Hydrophobic divinyl benzene structures retain nonpolar compounds and hydrophilic n-vinyl pyrrolidone structures...