ANALYTICAL - 255 Anuncios

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...

Miércoles 07 agosto 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...

Martes 06 agosto 2019

Cantidad : 100000TM - Precio : 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...

Jueves 01 agosto 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...

Jueves 01 agosto 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...

Martes 30 julio 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...

Viernes 12 julio 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...

Viernes 12 julio 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...

Viernes 12 julio 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...

Jueves 11 julio 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...

Jueves 11 julio 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...

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...

Lunes 08 julio 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...

Jueves 04 julio 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...

Viernes 21 junio 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...

Jueves 20 junio 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...

Jueves 20 junio 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...

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...

Miércoles 05 junio 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...

Viernes 27 octubre 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...

Sábado 14 octubre 2017

Cantidad : MOQ 5 TONS - Precio : 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...

Martes 15 agosto 2017

Cantidad : 100 - Precio : 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...

Viernes 14 abril 2017

Cantidad : 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...

Sábado 04 marzo 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,...

Sábado 04 marzo 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,...

Sábado 04 marzo 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...

Sábado 04 marzo 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...

Sábado 07 mayo 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...

Jueves 28 enero 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...

Martes 17 noviembre 2015

AC single phase 2 stage filter/EMI filter AC single phase 2 stage filer/EMI filter, EMC filter, AC filter, AC single phase filter, Electromagnetic filter Features and Application of AC single phase 2 stage filter 1.High security and reliability,high performance filters 2.Excellent...