QuEChERS (Quick, Easy, being inexpensive, Effective, Rugged and Safe) is internationally in recent years developed a kind of latest fast sample preparation techniques for agricultural products detection. It was first developed by M Anastassisdes of the United States department of agriculture (2003), and after extensive verification and improvement, the QuEChERS method was formally put forward. QuEChERS preparation methods of SPE pesticide residues upgrade version, it is similar to the SPE purification effect, but the processing step is more concise, possesses the characteristics of time saving, high efficiency, economy and gradually accepted by the general analysis of workers. Using QuEChERS kit, only a few simple steps are required to complete the sample preparation of multi-category and multi-residue pesticide analysis.

BM – Q series product is the best step of Shenzhen BM Life Science based on the development of the QuEChERS rapid processing products, a series of sample can be used in detect pesticide residues, veterinary drug residue detection, food additives, detection and other fields. This kind of product can be used many, many different kinds of adsorbent, such as BM – GCB depigmentation, BM – PSA to remove protein and organic acids, BM – NH2 removal of organic acid, BM – WCX purify alkaline substances, BM – C18 remove fat and other organic matter, alumina remove fat, anhydrous magnesium sulfate removal of moisture.In addition, by adding some buffer salts, it can help to better extract the drugs.A variety of collocation methods can be adopted to adapt to different pretreatment needs.

BM-Q series features:
★ High rate of recovery of drugs: a satisfactory recovery rate for most of the highly polar pesticides.
★ Wide range of applications: for analysis of a variety of samples.
★ Process simplicity: the method is simple, the operation steps are small, and the effect of human factors on the accuracy of the method can be reduced, while the laboratory efficiency can be improved and the laboratory workflow can be improved.
★ The results are reliable: the core raw materials are from the same supplier, and the consistency and stability of the target are more reliable.
★ Product environmental protection: the solvent consumption is little, clean environmental protection, after adding solvent, can seal the container immediately, reduce the harm to the operator.

Process description:

Sample processing:

To ensure the uniformity of the sample.Before use, the solid samples such as fruits and vegetables should be chopped and homogenated, and the sample of vegetables and fruits is usually 10-15g, and the homogenation of high speed tissue homogenation machine (RPM 11000 r/min-24000 r/min).

Step 1: sample extraction:

Measured amount of the broken sample is in the BM-Q extraction tube, added  the suitable organic solvents  to the BM-Q extraction tube, and the homogenizing or ultrasonic extraction was used to purify the liquid.

Step 2: purification

According to the sample, select the suitable BM-Q purifying pipe, and then add the extract to the purifying tube, shake well and mix well, and centrifuge the liquid concentration or direct sample detection.After a clean tube purification, the complex matrix can continue to purify the cleaning fluid to achieve the ideal purifying effect.

Notes:

When sample join of purge line, anhydrous magnesium sulfate may have a fever and gas occurrence, Suggestions of vibration wave after a period of time after open the centrifuge tube deflated to vibration wave and other operations.

When the water containing large amount of water is added to the purifying pipe containing magnesium sulfate, please add the solvent before adding the sample to prevent the result of the caking of the sample and the magnesium sulfate.

Please pay attention to the sealing of the product.When the product is unpacked, it can be sealed in sealed bag or stored in a dry or ventilated place.

Problems existing in the original QuEChERS method:

In the acid medium (orange), relatively alkaline pesticide recovery rate is low;Even in the neutral matrix, alkaline sensitive pesticides are degraded.

Solutions:

In the process of analyzing the acidic medium (orange) to join in the extract HAC and NaAc mixture, can maintain pH solution system between 4 to 5, so as to solve the problem of alkaline pesticide recovery is affected.

BM-QuEChERS Order Information
     A sample preparation method, proposed by Anastassiades in 2003, has been widely used in the detection of food, environmental water samples and soil contaminants.The products of our company are applicable to the Chinese agriculture department, NY/T, AOAC and eu EN.

This series of products can fully realize the automatic distribution, loading and packing of powder, realize the automation, scale and mass production, and accept the personalized customization.

Welcome the new and old customers to inquire, discuss cooperation and seek common development!