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Tuesday, July 30, 2019

Since its birth, the QuEChERS method has been widely used in pesticide residue analysis due to its unique advantages and characteristics of fast, simple and cheap. Lehotay et al. established a method, which uses the QuEChERS method to treat samples and analyze 229 kinds of pesticides...

Tuesday, July 23, 2019

White Portland cement or white ordinary Portland cement (WOPC) is similar to ordinary, gray Portland cement in all respects except for its high degree of whiteness. Obtaining this color requires substantial modification to the method of manufacture, and because of this, it is somewhat...

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...

Friday, July 12, 2019

Characteristics of QuEChERS QuEChERS is a pretreatment method for pesticide residue detection. This paper refers to the products produced by our company. Its name comes from the acronyms of the words “Quick, Easy, Cheap, Effective, Rugged, Safe”, which are also the characteristics...

Friday, July 12, 2019

Today, Hawach want to talk about the pre-treatment process for pesticide residue detection from the perspective of food safety – QuEChERS, and also tell you how to pre-treat pesticide residue food. Introduction The present analytical methods and determining techniques, pre-treatment...

Tuesday, July 09, 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...

Monday, July 08, 2019

QuEChERS is a pretreatment that has the characteristics of Quick、Easy、Cheap、Effective、Rugged and Safe, which is the reason why it is becoming more and more popular in the new testing methods. It was developed by Professor Anastassiades in 2003, which was used in agricultural testing at first...

Monday, July 08, 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...

Thursday, July 04, 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...

Thursday, July 04, 2019

The silicon hydroxyl group with strongly polar on the surface of glass sample vials will adsorb the samples. Based on such reasons, people produce hydrophobic glass surface through silylating the sample vials in order to eliminate the adsorption of the sample vials, which is widely...

Thursday, July 04, 2019

Activation, also known as solvation, add a suitable solvent to expand the functional groups on the adsorbent and remove possible interferences on the adsorbent. Equilibrium, remove the activated solvent to create a suitable solvent environment for sampling. Usually, use the same solvent...

Thursday, July 04, 2019

As an acronym for Quick, Easy, Cheap, Effective, Rugged and Safe, the method of QuEChERS achieves as a variety of sample preparation and clean-up techniques for the analysis of multiple pesticide residues in the field of agriculture. Originally designed for the analysis of fruits and vegetables...

Tuesday, July 02, 2019

The average sample addition recovery rate of QuEChERS method is higher than 85%, with fewer impurities interfering with the detection of the target substance, a small amount of solvent, simple and fast operation, which will be the preferred pretreatment method for routine detection...

Tuesday, July 02, 2019

Fitting most commercially available Soxhlet extractors, we offer a variety of selection of high-quality extraction. To achieve an efficient and reliable analysis in the lab, the extraction thimbles are used to extract certain components out of the sample of solid material. The thimbles...

Monday, July 01, 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...

Monday, June 24, 2019

QuEChERS is widely used in many areas, in the case that the targeting recovery rate satisfies the need, and also the matrix background of removing impurities meets detection, it can be applied to purify stuff such as residues of food and veterinary, additives, plasticizers. However...

Thursday, June 20, 2019

Extraction is often susceptible to matrix interference. One analytical method is fine in this matrix but can become problematic in another matrix. If we encounter such a situation, how can we improve the QuEChERS method to overcome it? For pesticide residues, most of the food samples...

Wednesday, June 19, 2019

Take the example of pear test to check whether a pear is up to the standard. Prepare the environment The first step: Suitable Acetonitrile salting-out extraction environment was prepared. Make the pears into a puree, take 10g to QuEChERS centrifuge tube of 50ml. Add extract solution...

Thursday, June 13, 2019

Package 1 QuEChERS extracting pesticide residues from plants Extraction box: 50 ml centrifuge tube + AOAC/EN salt pack 2 kinds of buffer salts: General buffer salt for phase-separation and pH-adjustment; Anhydrous magnesium sulfate completely separates water in the matrix from the...

Friday, June 07, 2019

QuEChERS method was originally applied to extract pesticides from fruits and vegetables. Whether under AOAC or EN stipulations, according to our products' Application and Test Report, we can see that the combination of salting out and d-SPE-purification in the initial liquid-liquid...

Friday, June 07, 2019

Syringe filters are one of the types of filters. The structure design of the syringe filter is precise and the liquid is filtered smoothly. Internal space design is reasonable, so the residue rate is very low. In addition, the syringe filter has the following characteristics. Characteristics...

Wednesday, June 05, 2019

Raw Materials Japan AGC Glass with 0.33mm thickness Japan explosion-proof AB glue South Korean imported Coating Processing Methods Imported high quality glass raw materials Etched glass shape and hole Tempered glass processing Vacuum plasma coating to anti-fingerprint on glass surface...

Wednesday, June 05, 2019

Extraction thimble sizes should be decided as per users' specific applications. Every single size represents the particular practice of displaying the internal diameter and general length of the thimble in millimeters. Thus the extra allowance for the thickness of the thimble wall...

Tuesday, June 04, 2019

What should we consider when it comes to purchasing syringe filters of high cleanliness? When we talk about syringe filter cleanliness, we should consider particle contamination from filter, filter hardware, filter installation and the using process as each source may increase the...

Monday, June 03, 2019

Electric Cleaning Agent is mainly used for eradicating dirt, dust, and contaminations on the power equipment surface especially clean those which surface was heavily polluted. After cleaning it can significantly enhance the adhesion between the RTV coatings and the surface of insulator...

Wednesday, March 06, 2019

Electric flat die wood pellet mill is suitable for medium, small sized wood pellet plants or family for commercial heating or warming. The raw materials can be sawdust, agricultural residues or energy crops. Electric Flat Die Wood Pellet Mill Features ▷The machine can suppress biomass...

Monday, January 21, 2019

Athletic Tape 1.Waterproof·Elasticity 170%, good tensile strength·Strong and reliable sticky with high adhesion.Elastic cotton substrate.Latex free. 2.Soft, comfortable and skin breathable with cotton material.Hypoallergenic adhesive, leaves no residue on body parts. Location : Block 8...

Friday, December 21, 2018

Quantity : 150 pcs/mo - Price : 1000 USD/pcs

FREE-Valve's Ceramic Knife Gate Valves are known as slurry gate valves. Its have simple structure and can cut off medium which contains solid particles and fibers, but for some very hard particles or serious erosive mediums, general metal seated knife gate valves will be washed out easily...

Tuesday, October 23, 2018

Quantity : + 1.000.00

Hello, I am a young producer of Moroccan mint in the region of Oulad Said (SETTAT), I work under the norms, I can provide you certificates of analyzes that I do very often for a very precise control (Soil, foliere, water of irrigation, pesticide residues) do not hesitate to contact...

Friday, August 24, 2018

This solid liquid separator equipment mainly used in animal manure management, such as cow dung, chicken manure etc. It separates the solid from the liquid. After separation, the organic solids can be further processed into organic/bio organic fertilizer or commercial compost for sale...