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Wednesday, September 18, 2019

Selection of scavengers The conventional QuEChERS method only uses PSA which is too simple single that can no longer meet the complex matrix samples examination experiments. GCB (graphitized carbon black) can effectively adsorb pigments, non-polar interferences such as sterol due...

Wednesday, September 18, 2019

Hawach SPE Cartridges are made of medical grade PP and forming in one time. Frits are made of UHMW-PE. There is a variety of models to choose, such as Normal Phase Cartridge, Reversed Phase Cartridge, Ion Exchanges Cartridge, Mixed Mode Cartridges and so on. Here, We would like to...

Tuesday, September 17, 2019

The extraction thimble is formed by folding a certain length of straightened filter material and gluing the head and the tail. - Classification of extraction thimble - There are many kinds of extraction thimbles, which can be divided into thin and long ones and thick and short ones...

Monday, September 16, 2019

The extraction is divided into liquid phase extraction (LLE) and solid phase extraction (SPE). SPE technology is a column chromatography separation process. The technology is a combination of liquid-solid extraction and column liquid chromatography. The combination of this technology...

Friday, September 13, 2019

Some samples (such as avocado, peanuts, olive oil, etc.) contain more fat. Due to the limited solubility of fat in acetonitrile, the recovery rate of some fat-soluble pesticides (such as HCB, DDT, etc.) is reduced. How to overcome the low experimental results caused by fat? You can...

Thursday, September 12, 2019

Cellulose extraction thimbles are highly recommended as the high-quality sample reservoirs for quality control, research, and analytical applications especially when solvent extraction of solids and semi-solids need to be carried out. And the use of a Soxhlet extractor loads the safe...

Wednesday, September 11, 2019

Generally, there are five types of filter capsule based on the membrane it contains, which includes PES, PP, PTFE, Nylon and GF type. The former three types are widely applied in various fields and receive great feedback from the users. - PES Filter Capsule - The PES filter capsule...

Wednesday, September 11, 2019

The structure of the SPE cartridge is mainly divided into four parts: column tube, sieve plate, adsorbent and supporting device. The characteristics of each part are briefly introduced below. Column tube: A carrier for the adsorbent, made from serum grade polypropylene. Commonly used...

Tuesday, September 10, 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;...

Tuesday, September 10, 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...

Saturday, August 24, 2019

If you decide to try QuEChERS, you're going to find that the extraction salt comes in three basic varieties which are the original QuEChERS method, the CEN method and the AOAC method. The original method is sometimes referred to as the unbuffered method. What does that mean? Being...

Thursday, August 22, 2019

QuEChERS is an extraction method for pesticides in fruits and vegetables. It is also a cleanup method we use to remove sugars, lipids, organic acids, proteins, pigments, and excess water. After the publication of the original QuEChERS method in 2003, QuEChERS has been practiced all...

Friday, August 16, 2019

The membrane filters of different materials have different characteristics. Here are as follows: - Nylon (NY) Material - Features: hydrophilic, resistant to some organic materials, not strong acid, protein binding capacity is high, so it is not suitable for protein recovery. Application...

Thursday, August 15, 2019

Review the article that I had written for product introductions, it seems that the content which making fun of products basically does not have, a person with the label of “warm person heart” is wearing very tired. The things about making fun are so cool to be said completely by naked...

Thursday, August 15, 2019

In the detection of air pollution, taking samples with glass fiber extraction thimble is a common method. And here we will focus on one reason having an influence on weighing the extraction thimbles, which is the air humidity. As we all know, the environment when analyzing is limited...

Wednesday, August 14, 2019

After years of development, the QuEChERS pretreatme nt method has been continuously improved and broadened by researchers as a simple and rapid residual pretreatment technology. The application target also has been extended from the highest moisture content of vegetables and fruits...

Tuesday, August 13, 2019

In the labs, experimenters always take samples with fiberglass extraction thimbles. And weighing the extraction thimbles is quite important for the results of the experiments. Does the cooling time have obvious influences when weighing the extraction thimbles that are taken out of the ovens...

Monday, August 12, 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...

Friday, August 09, 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...

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...

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...

Wednesday, August 07, 2019

The thimble is utilized in extraction, so the dissolution rate of impurities is a comparatively deductive target. For the deficient data of cellulose extraction thimbles, the mental content in glass fiber ones has to be tested, and respective results of different sizes are listed...

Tuesday, August 06, 2019

Ion-exchange solid phase extraction is widely used in biological samples and environmental monitoring. During the extraction process, the pH of the sample is adjusted so that the solute is easily ionized. The solute is exchanged from the resin by changing the pH or increasing the...

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...

Monday, August 05, 2019

QuEChERS method has unique advantages in pesticide residue analysis. Due to the irrational use of pesticides and inadequate supervision of pesticide use, people may suffer from acute or chronic pesticide poisoning after eating pesticide-contaminated food, and even threaten human health...

Monday, August 05, 2019

Category of extraction thimbles In terms of the material, extraction thimbles series in Hawach are divided into three main types – cellulose and glass fiber extraction thimble. However, the quartz one can not be manufactured in China, so the other two are currently occupying all thimbles...

Saturday, August 03, 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...

Thursday, August 01, 2019

QuEChERs is a sample treatment and purification technology for the detection of multiple pesticide residues in high-water-content food. Because it simplifies the previously complex extraction procedures and expands the scope of the extracted pesticide residues, QuEChERs becomes an...

Wednesday, July 31, 2019

Bag filter housings are multi-purpose filter equipment with the features of novel structure, small size, simple and flexible operation, energy saving, high efficiency, airtight work and strong adaptability. Otherwise, they are very convenient to replace the filter bags and there is...

Wednesday, July 31, 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...