Purifying Agent Adopted In QuEChERS
The purifying agent holds an important position in the QuEChERS pre-treatment method. An appropriate selection and application of it would be necessary for the users to improve the efficiency of purification and accuracy of the sampling detection result.
Selection of purifying agents
There are two kinds of the purifying agent that are widely adopted in the practical application of QuEChERS – PSA and C18. PSA mainly removes polar substances, such as sugars, fatty acids, organic acids, phenols, and lipophilic pigments. And the C18 is the most significant purifying agent for QuEChERS, which mainly adsorbs non-polar substances, such as fat through its silica matrix adsorbent.
Both of them have a slight infection on the recovery rate of the samples, but they are not ideal for the purification effect of pigment. On the contrary, the adsorption effect of CGB on the pigment can reach 90%. due to its low recovery rate during the detection of multi-residue pesticides, CGB is generally avoided to be used.
Dosage of purifying agents
Usually, the dosage of PSA and C18 is chosen as 200mg, which has a better purification effect and higher recovery rate. For the dosage of GCB, it is usually 10mg in terms of the color shade of extract liquor.
Persona a contactar : Bruce Lu, +86 29 89284429
Buen trato: comprar del vendedor
Por favor, lea nuestras condiciones de uso. También puede visitar nuestras preguntas frecuentes y ver nuestra información sobre los riesgos relacionados con la falsificación.
|
Esta página es acerca de los importadores y exportadores de Purifying Agent Adopted In QuEChERS Buscar en la categoria : Varios / Descuento Buscar en la categoria : agent, adopted, purifying, quechers |
Monday 28 December 2015
Cantidad : OEM/ODM Se - Precio : OEM/ODM Services
Materias primas de crisol de grafito es alto del contenido en carbono, tiene las ventajas de gran conductividad térmica y resistencia a la corrosión del carbono producto. Crisol de grafito tiene buena conductividad termica y alta resistencia a la temperatura.Coeficiente de expansión...
XRD Graphite Manufacturing Co., Ltd
- zcxooo
- 467400 - Pingdingshan
- 86 15516002510
Thursday 07 March 2013
Cantidad : 10 - Precio : 800,00 €
Origin China Model Number R206100 Brand Name Anilutum Gender Men's Material Polyester Season Winter Type Business Suit Brand Anilutum The New The British Gentleman Slim Small Suit Jacket Brand: Anilutum Style: Fashion Type: Men's Suit Online: 9AP-5PM Aoniludan...
H&Y International Fashion Limited
- anilutum
- EC1V 2NX - London
- +86 13724036041
Thursday 14 March 2013
Cantidad : 2 - Precio : 1 000,00 €
Aniltum Brand New Men's coat Fashion casual windbreaker Slim England Coat S223286 Made In China Model Number S223286 Brand Name Anilutum Gender Men's Material Polyester Season Winter Type Coat Brand: Anilutum Style: Fashion Type: Men's Coat Online: 9AM-5PM Aoniludan...
H&Y International Fashion Limited
- anilutum
- EC1V 2NX - London
- +86 13724036041





