ANALYTICAL - 256 Annonces

Vendredi 16 août 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...

Vendredi 09 août 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...

Mercredi 07 août 2019

Each analyst needs filter paper, which is a product with high consumption in the laboratory. Filter paper is commonly used in analytical laboratories as a filter medium to separate the solution from the solid. Basic introduction The paper is loose and has strong absorption performance to liquid...

Mardi 06 août 2019

Quantité : 100000TM - Prix : 50USD

Uses of Diethanolamine Diethanolamine similar to triethanolamine (T775580) is used as a surfactant. It also has the potential to be a corrosion inhibitor by means of chemisorption. Definition of Diethanolamine ChEBI: A member of the class of ethanolamines that is ethanolamine having...

Jeudi 01 août 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...

Jeudi 01 août 2019

Quantitative filter papers are widely used for quantitative and gravimetric analysis in the lab. To make them ash-less and achieve high purity, a special production process with acid is required in production, washing with HF or HCl acids, cleaning with demineralized water followed...

Mardi 30 juillet 2019

Quantitative filter paper or qualitative filter paper, it is a question. While at the very beginning, we can distinguish from the literal meaning between quantitative and qualitative. Quantitative refers to fixed quantity, more about physical properties. Qualitative refers to fixed quality...

Vendredi 12 juillet 2019

Hawach Scientific mission is to work with our customers to make the world healthier, cleaner and safer. We help our customers accelerate research in the life sciences, solve complex problems and challenges in the analytical field, promote the development of medical diagnostics, accelerate...

Vendredi 12 juillet 2019

Note on the filter paper box that when using the quantitative and qualitative analysis filter paper to filter the precipitate: 1. Generally uses natural filtration, using the filter paper body and the ability to retain solid particles to separate the liquid and solid; 2. Because the...

Vendredi 12 juillet 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...

Jeudi 11 juillet 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...

Jeudi 11 juillet 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...

Mardi 09 juillet 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...

Lundi 08 juillet 2019

HPLC is the separation of sample components between the column packing and the mobile phase for mass exchange. Therefore, the mobile phase is required to have the following characteristics: a. the flow relative to the sample has a certain solubility, to ensure that the sample components...

Jeudi 04 juillet 2019

Manufactured from the same raw materials as the ashless grades, the qualitative filter paper is suited for ordinary filtration when we need to determine materials by using qualitative analytical techniques in the lab, with the features of fast flow rate due to their structure. Qualitative...

Vendredi 21 juin 2019

Normally SPE cartridge has two basic adsorption modes: target compound adsorption mode, impurity adsorption mode; 5 operation modes: gravity operation, manual positive pressure, centrifuge, negative pressure and positive pressure mode. Now let's review the whole process step by step...

Jeudi 20 juin 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...

Jeudi 20 juin 2019

Filter paper has excellent filtration property and strong absorption performance on liquid. Scientific workers use filter paper as a kind of media in analytical laboratories to separate solution from solid. Currently, there are mainly three kinds of filter papers which can be purchased...

Mardi 11 juin 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...

Mercredi 05 juin 2019

Hawach summarized the advantages of QuEChERS in eight aspects. 1. Recovery Rate QuEChERS technology has the advantage of high recovery rate. Experimental data show that the recovery rate of large quantities of polar and volatile pesticides by QuEChERS is above 85%. 2. Accuracy Laboratory...

Vendredi 27 octobre 2017

Building material combustion calorific value calorimeter Mainly used for the detection of stone, wood, concrete, evenly dispersed mineral wool and polymers and other building materials, the determination of calorific value of fuels, used in building research and technical supervision...

Samedi 14 octobre 2017

Quantité : MOQ 5 TONS - Prix : USD 1760 PER TON

Quick Details Classification: Ammonium Organic Salt CAS No.: 6009-70-7 Other Names: NO MF: CH3COONH4 EINECS No.: 214-202-3 Place of Origin: China (Mainland) Purity: 99.6% MIN Appearance: White Crystal Application: Used for safety explosive , analytical reagent and organic synthesis...

Mardi 15 août 2017

Quantité : 100 - Prix : 1,00 €

La chromatographie en phase gazeuse (GC) est une technique analytique pour une grande variété d'identification et de quantification des composés organiques volatils et / ou semi-volatils. C'est une technique indispensable pour le laboratoire d'analyse pour analyser une variété de...

Vendredi 14 avril 2017

Quantité : 2 MT

Name: Yttrium chloride anhydrous CAS: 10361-92-9 Molecular formula: YCl3 Specifications: YCl3 / RECl3: > 99%, Yttrium chloride products accounted for the content of rare earth chloride> 99%, H2O <0.5%</p> Packing: 5kg / bag vacuum packaging, topical iron drum 50kg / barrel...

Samedi 04 mars 2017

Tige de carbure de silicium est faite de carbure de silicium hexagonal verte de haute pureté comme matière première principale, selon un certain ratio de blancs de traitement, la 2200 ℃ haute température silicification recristallisation frittage et fait de tige en forme de tube,...

Samedi 04 mars 2017

Tige de carbure de silicium est faite de carbure de silicium hexagonal verte de haute pureté comme matière première principale, selon un certain ratio de blancs de traitement, la 2200 ℃ haute température silicification recristallisation frittage et fait de tige en forme de tube,...

Samedi 04 mars 2017

Tige de carbure de silicium est faite de carbure de siliconium hexagonal verte dehautepuretécommematièrepremièreprincin cale，selon un certain ratio de blancs de traitement，la 2200℃hautetempératuresilicificationrecri stallisation frittage et fait de tige en forme de tube，àhautetempératurenonmétalli...

Samedi 04 mars 2017

Tige de carbure de silicium est faite de carbure de silicium hexagonal verte de hautepuretécommematièrepremièreprincipal e，selon un certain ratio de blancs de traitement，la 2200℃hautetempératuresilicification recristallisation frittage et fait de tige en forme de tube，àhautetempérature...

Samedi 07 mai 2016

- Quick Details - - CAS No.: 7783-6-4 - Other Names: Hydrosulfuric acid, Hydrothionic acid, Sulfhydric acid - MF: H2S - EINECS No.: 231-977-3 - Place of Origin: Sichuan, China (Mainland) - Grade Standard: Industrial Grade - Purity: 99.999%, 99.999% - Appearance: Colorless...

Jeudi 28 janvier 2016

Product Name: SHMP Specifications: 68.0% Product Category: Sodium Salt Sodium Hexametaphosphate(SHMP) 1.Specification: Specifications Industrial Grade Food Grade Total phosphate, as P2O5%≥ 68.0 68.0 Inactive phosphate, as P2O5%≤ 7.5 7.5 Iron, as Fe %≤ 0.05 0...