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.
Personne à contacter : Bruce Lu, +86 29 89284429
Bonne affaire : acheter au vendeur
Nous vous invitons à lire nos conditions générales d'utilisations. Vous pouvez aussi vous rendre sur nos FAQ et consulter notre page d'informations sur les risques liés à la contrefaçon.
|
Cette page concerne les importateurs et exportateurs de Purifying Agent Adopted In QuEChERS Rechercher dans la catégorie : Divers Rechercher dans la catégorie : agent, adopted, purifying, quechers |
Tuesday 14 April 2026
Quantité : 1 set - Prix : 2000-40000USD
We are manufacturing feed mixing machines, such as single-shaft mixer, double-shaft mixer, ribbon mixer, fodder mixing machine, coal dust mixer, fertilizer mixer, wood wastes mixing machine and so on. Fish Feed Mill Ribbon Mixer Machine Features: 1. The mixing chamber is constituted...
Changzhou Farthest Machinery Co., Ltd.
- 213332 - Liyang
- 8651983107186
Friday 21 March 2014
Quantité : 1 - Prix : 43000 USD
- SD-YAG3015 metal laser equipment machinery for plate//steel/tubes cutting - laser equipment | metal laser cutting | cutting equipment YAG Metal Laser Cutting Machine Cutting Demo Video Youtube: http://youtu.be/jgCFmr1RUQ0 SD-YAG3015 CNC laser cutting machine suitable for...
Shanda Luneng Information Technology Co., Ltd.
- 2500000 - Jinan
- 86 0531 85056757
- 86 15806623621
Tuesday 14 April 2026
Quantité : 1 set - Prix : 2000-20000USD
We are manufacturing feed mill complete project,biomass processing complete project,Compound fertilizer processing. We can also provide Grinding and Pulverizing; Dosing and Mixing; Pelleting; Extruding and Expanding; Cooling, Crumbling and Sieving; Stabilizing, Drying, Coating and Bagging off...
Changzhou Farthest Machinery Co., Ltd.
- 213332 - Liyang
- 8651983107186
Paiement sécurisé




