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The History and Development of Reversed-Phase Chromatography

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Performance and Maintenance of HPLC Columns

Jueves 08 agosto 2019

Chromatography is a separation and analysis method and the separation is the core. Therefore, HPLC columns are the heart of the chromatographic system. The requirements for the column are high efficiency, good selectivity and fast analysis speed. Generally, the column length of about...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
SPE Cartridge Packaging And Application

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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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China 710077 Varios / Descuento
Three Types Of SPE Cartridges

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Several Attentions about Using and Maintaining Chromatographic Columns

Jueves 01 agosto 2019

It is important for the experimenters to use and maintain chromatographic columns correctly. They should focus on many some things so as to protect the columns in the using process. Here we talk about several attentions. Avoid changing pressure and temperature dramatically and any...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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China 710077 Varios / Descuento
Model Of Solid Phase Extraction

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Bonded-Phase Chromatography

Viernes 19 julio 2019

Bonded-phase chromatography is a liquid-liquid chromatography method in which a stationary phase is covalently bound to a carrier particle, which overcomes the mechanical shock in the distribution chromatography, the constant loss of the stationary phase and the gradual change of...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Introduction to SPE Cartridges

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
How to Clean the HPLC Columns

Martes 09 julio 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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Polymeric MCX SPE Cartridges

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Low Recovery Rate of SPE Cartridges

Lunes 08 julio 2019

People should face are a lot of problems when using SPE cartridges. As a consequence, we will talk about why the cartridge has a low recovery rate in the experiments. The first reason for the low recovery rate is that the target object does not remain sufficiently on the fillers....

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Normal Phase HPLC Column and Reverse Phase HPLC Column

Viernes 05 julio 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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
C8 HPLC Columns

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...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Polymeric HLB SPE Cartridges

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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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China 710077 Varios / Descuento
How to Use and Maintain Reversed-Phase HPLC Columns(1)

Jueves 04 julio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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China 710077 Varios / Descuento
Cleaning Silica Gel Bonded HPLC Columns

Martes 02 julio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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  • +15 1 02 91 81 33
China 710077 Varios / Descuento
Principles for Selecting SPE Cartridges Specifications

Lunes 01 julio 2019

After selecting the type of SPE cartridges, we have to determine the specifications of the SPE cartridge. The principle of selecting the SPE cartridge specification is to first ensure that the SPE cartridge packing has sufficient capacity to retain the target compound 100% on the column...

Hawach Scientific Co.,Ltd.

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China 710077 Varios / Descuento
Normal & Reversed HPLC Column

Viernes 28 junio 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...

Hawach Scientific Co.,Ltd.

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China 201306 Informática
Liquid Level Gauge XY-LGR

Lunes 24 junio 2019

Low-power Liquid Level Sensor With 3.3-5V Output Low power Liquid Level Gauge, it was design for internet of thing specially, its low power consumption is suitable to power by battery and Periodic supply,can be used to measure liquid level for fire protection water net, heating system...

Shanghai Xuyan Precision Technology Co., Ltd.

  • 201306 - shanghai
  • +86 215 9241315
China 201306 Informática
Lightning Protection Liquid Level Sensor XY-LS200

Lunes 24 junio 2019

Lightning Protection Hydraulic Liquid Level Transmitter & Gauge Lightning protection liquid level Sensor,can be used to measure liquid level for Reservoirs, river, sewage treatment, urban water supply, water tank, ocean level and others field need liquid level measurement. Typical...

Shanghai Xuyan Precision Technology Co., Ltd.

  • 201306 - shanghai
  • +86 215 9241315
China 710077 Varios / Descuento
Introduction of Sampling System for Cationic Chromatographic Columns

Viernes 21 junio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
China 710077 Varios / Descuento
The Brief Introduction to SPE Cartridges

Miércoles 19 junio 2019

SPE cartridges, with a full name of Solid Phase extraction cartridges, is also called the SPE column( solid phase extraction column). The solid phase extraction column/cartridges is a pretreatment device for the sample being analyzed, which developed from the chromatographic column...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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  • +15 1 02 91 81 33
China 710077 Varios / Descuento
HPLC Column Silicone Matrix Properties and Scope of Application

Viernes 14 junio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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China 710077 Varios / Descuento
NH2 HPLC Columns

Jueves 13 junio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
China 710077 Varios / Descuento
Functions of Hawach SPE Cartridges during Extraction

Martes 11 junio 2019

Solid phase extraction (SPE) is a separation process by which compound that is dissolved or suspended in a liquid mixture, thereby being separated from other compounds in the mixture according to their physical and chemical properties. There are 4 general functions as below: 1.Matrix...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
China 710077 Varios / Descuento
SPE and the SPE Cartridges

Jueves 06 junio 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
China 201306 Bienes de equipo
Digital Liquid Level Gauge XY-LGD

Lunes 20 mayo 2019

Low-power Digital Liquid Level Sensor With 0.5-2.5V Output Low power Liquid Level Gauge is design for internet of thing specially. Its low power consumption is suitable to power by battery and Periodic supply. It can be used to measure liquid level for fire protection water net, heating system...

Shanghai Xuyan Precision Technology Co., Ltd.

  • 201306 - shanghai
  • +86 215 9241315
China 201306 Bienes de equipo
Corrosive Liquid Level Sensor XY-LS500

Lunes 20 mayo 2019

Corrosive Hydraulic Liquid Level Transmitter & Gauge The anti-corrosion liquid level transmitter is based on the principle of hydrostatics to measure the level or water depth,high corrosion resistance for Sulfuric Acid(H2SO4), Hydrochloric Acid(HCI), Sodium Hydroxide(NaOH). Corrosive...

Shanghai Xuyan Precision Technology Co., Ltd.

  • 201306 - shanghai
  • +86 215 9241315
China 710077 Varios / Descuento
Normal Phase Cyanopropyl (CN) SPE Cartridges

Lunes 29 abril 2019

CN (cyanopropyl) solid phase extraction (SPE) cartridge, CN (cyanopropyl) is a weakly hydrophobic silica matrix filler, which can be used as a normal phase or reverse phase adsorbent. The non-polar or weakly polar acid, medium and basic compounds are extracted from the aqueous solution...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
China 361009 B2B Servicios
Bently Nevada 3300/46 3300/46-46-04-02-01

Sábado 01 septiembre 2018

Cantidad : 1 - Precio : 111,00 €

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