Method for quickly screening existence of melamine urea formaldehyde resin in feed

A technology of melamine urea and formaldehyde resin, applied in the field of testing, can solve the problems of animal death, animal harm, lack of testing standards, etc.
CN102721731AInactive Publication Date: 2012-10-10INST OF QUALITY STANDARDS & TESTING TECH FOR AGRO PROD OF SHANDONG ACADEMY OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF QUALITY STANDARDS & TESTING TECH FOR AGRO PROD OF SHANDONG ACADEMY OF AGRI SCI
Publication Date
2012-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for quickly screening the existence of melamine urea formaldehyde (MUF) resin in a feed. The method comprises the following steps: firstly, weighing a feed sample and placing the feed sample into a plastic centrifuge tube with a stopper, adding tetrahydrofuran-water solution into the plastic centrifuge tube, oscillating the plastic centrifuge tube in a whirling manner, adding methanol for ultrasonic extraction, centrifuging, filtering the supernatant fluid to another plastic centrifuge tube with a stopper, adding methanol into the first plastic centrifuge tube for repeated extraction one more time, merging the supernatant fluid, blowing and concentrating the supernatant fluid to be nearly dry, conducting constant-volume filtering through methanol-water, then adopting a capillary cataphoresis-DAD (photo-diode-detector) for detection, and determining that the MUF resin exists in the feed if a characteristic absorption peak exists at the detection wavelength of 224nm. The method quickly screening the existence of melamine urea formaldehyde (MUF) resin in the feed, provided by the invention, plays a supervision role on the quality safety of dairy food.
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Description

technical field

[0001] The invention relates to a method for quickly screening whether there is melamine urea formaldehyde resin in feed, and belongs to the technical field of detection. Background technique

[0002] Melamine urea-formaldehyde resin (MUF) is a modified resin obtained by adding melamine on the basis of urea-formaldehyde resin, also known as melamine-modified urea-formaldehyde resin. Due to the high cost of melamine formaldehyde resin (MF) and the poor water resistance of urea formaldehyde resin (UF), melamine urea formaldehyde resin (MUF) is cost-effective and has good water resistance. At present, most wood processing enterprises have adopted melamine urea formaldehyde resin. as an adhesive. Although most wood processing enterprises use melamine urea formaldehyde resin as an adhesive, there is a lack of understanding of its bonding mechanism, quality testing, and correct use. Feed binder, also known as excipient, is mainly used to process pellet feed, whic...

Claims

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