CHROMATOGRAPHIC - 159 ads

Material and Maintenance of HPLC Columns

Monday, August 12, 2019

The system of an HPLC column is composed of a liquid, a reservoir, a pump, a sampler, a column, a detector and a recorder. - The packing material of HPLC columns - The packing material has high carbon content, small surface polarity, very low chemical purity and high surface separation...

Hawach Scientific Co.,Ltd.

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The History and Development of Reversed-Phase Chromatography

Friday, August 09, 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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Normal Problem and Solution in GC Test

Thursday, August 08, 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...

Hawach Scientific Co.,Ltd.

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Features of Flash Column and Factors Affecting the Life of Flash Column

Thursday, August 08, 2019

Flash columns adopt high-capacity silica gel for precise filling, which has very excellent separation and purification performance. The specific surface area of high-capacity spherical silica gel is 40% higher than that of ordinary spherical silica gel, and the sample loading is twice...

Hawach Scientific Co.,Ltd.

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Performance and Maintenance of HPLC Columns

Thursday, August 08, 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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SPE Cartridge Packaging And Application

Thursday, August 08, 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.

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QuEChERS Solvent

Wednesday, August 07, 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...

Hawach Scientific Co.,Ltd.

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Tips for Using a Flash Column

Tuesday, August 06, 2019

In recent years, the application of HPLC in inorganic analysis has developed rapidly, and the use of flash columns has been more and more widely because of a method that can rapidly determine heavy metal elements in environmental water samples. Matters needing the attention of flash columns 1...

Hawach Scientific Co.,Ltd.

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Vacuum Filtration Structural Components

Monday, August 05, 2019

Vacuum Filtration is a device for accelerating water filtration by negative pressure caused by air extraction. It's a filtering product that most lab customers will be used for suspension detection in water extraction filtration, microbial limit detection extraction filtration, chromatographic...

Hawach Scientific Co.,Ltd.

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The Main Factor of Affecting the Life of the Liquid Chromatographic Column

Monday, August 05, 2019

One of the main factors affecting the life of the liquid chromatographic column is the mobile phase. There are three aspects of the mobile phase factors. The pH value of the Mobile Phase The fillers of different substrates apply to different pH value range. Under normal temperature...

Hawach Scientific Co.,Ltd.

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What Causes Pollution Of HPLC Column?

Friday, August 02, 2019

Usually, the sample contains something that is not of interest to the analyst. Salt, lipids, lipid-containing substances, humic acid, hydrophobic proteins, and other biological substances are some substances that may interact with the HPLC column in use. These substances have less...

Hawach Scientific Co.,Ltd.

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Several Attentions about Using and Maintaining Chromatographic Columns

Thursday, August 01, 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.

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How to Prevent the HPLC Column Failure

Tuesday, July 30, 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...

Hawach Scientific Co.,Ltd.

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Method of Cleaning The Solution Of The Sample Vial

Monday, July 15, 2019

The sample vials were cleaned according to different contamination levels. Generally, the cleaning method is selected according to the degree of pollution. If the cost is adequate, it is best to use a new one every time. Solution method of cleaning sample vials: 1. Rinse with running...

Hawach Scientific Co.,Ltd.

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The Use of Microporous Membrane

Monday, July 15, 2019

Laboratory workers use a membrane to filter two phases. Actually, the membrane is a kind of media. According to different aperture sizes, filter membranes can be divided into the microporous membrane, ultrafiltration membrane, nanofiltration membrane a nd reverse osmosis membranes...

Hawach Scientific Co.,Ltd.

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Product Highlights & Data Evidence Of HPLC

Monday, July 15, 2019

All the technique cores of HPLC from Hawach Scientific are focused on the characteristics of the chromatogram column. Quality Recognition This is shown as the fact that terminal customers have published more than 500 papers on those journals at home and abroad. For famous oversea journals...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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What are the Advantages and Principles of the SPE Cartridges?

Monday, July 15, 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...

Hawach Scientific Co.,Ltd.

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Comparison Between SPE/FLASH and HPLC Column

Thursday, July 11, 2019

Columns Ahead Statement Generally speaking, SPE/FLASH is mainly applied to the pretreatment of samples. People can easily perceive that SPE/FLASH columns separate salt and sugar, while HPLC ones can make glucose, maltose and sucrose apart from the sugar solution, which posses more...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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  • +15 1 02 91 81 33
The Choice, Use, and Maintenance of HPLC Column

Thursday, July 11, 2019

With the development of society and technology, chromatographic analysis theory has also been developing rapidly. HPLC column has now been widely applied in every field of laboratory analysis. HPLC column gathers function of both detection and separation. With the right choice, use...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
The Choice, Use, and Maintenance of HPLC Column

Thursday, July 11, 2019

With the development of society and technology, chromatographic analysis theory has also been developing rapidly. HPLC column has now been widely applied in every field of laboratory analysis. HPLC column gathers function of both detection and separation. With the right choice, use...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
Introduction to SPE Cartridges

Thursday, July 11, 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.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
Different Applications of Qualitative and Quantitative Filter Paper

Wednesday, July 10, 2019

The biggest feature of filter paper is paper with good filtration performance. At present, the filter papers produced in China mainly include quantitative analysis filter paper, qualitative analysis filter paper and chromatographic qualitative analysis filter paper. Quantitative filter...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
Rapid Chromatography And Flash Column

Tuesday, July 09, 2019

Rapid chromatography Technology for the separation and purification of natural products and biological macromolecules. It has the advantages of easy operation, cheap price, and rapid analysis, and a few other technologies can match the rapid chromatography in the application of purifying...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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  • +15 1 02 91 81 33
C8 HPLC Columns

Thursday, July 04, 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.

  • 710077 - Xi'an
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  • +15 1 02 91 81 33
The Cleaning Methods Of Sample Vials

Wednesday, July 03, 2019

Chromatographic analysis technology has been widely used nowadays. It is quite important to clean the chromatographic sample vials carefully. When the number of samples is enormous, a large number of chromatographic sample vials need to be cleaned during the experiments. If the sample...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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Guide To Select Flash Column

Wednesday, July 03, 2019

Flash column chromatography is an efficient way to separate complex mixtures of compounds in the lab. we use compressed air to push the solvent through the column when we are running flash columns. It can help provide better separation and cut down the running time as while. Flash...

Hawach Scientific Co.,Ltd.

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Nine Features of the Bottle-Top Dispenser

Tuesday, July 02, 2019

Hawach bottle-top dispenser combines the latest liquid accurate dispensing technology, high-tech materials, and ergonomically designed advanced dispensers, which are simple, safe, reliable and highly accurate laboratory liquid handling equipment. Bottle-top dispenser features 1. Fast...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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Cleaning Silica Gel Bonded HPLC Columns

Tuesday, July 02, 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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Precipitation when using Filter Papers

Monday, June 24, 2019

When using filter paper, we should pay attention to the fact that when the filter paper is not displayed on the paper box of the filter paper, the precipitation should be paid attention to when using the quantitative and qualitative analysis filter papers. (1) Natural filtration is...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
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The Brief Introduction to Flash Column

Friday, June 21, 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...

Hawach Scientific Co.,Ltd.

  • 710077 - Xi'an
  • +86 29 89284429
  • +15 1 02 91 81 33
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