Intelligent solution for pre-treatment of propylene glycol in milk

On July 3, the results of the testing of McKenzie's pure milk came out, and the pure milk became "flavored milk" finally.

Xinjiang Uygur Autonomous Region Market Supervision Administration issued the "Xinjiang Uygur Autonomous Region Market Supervision Administration on the progress of strict investigation of the problem of propylene glycol detected in pure milk of Mackenzie" shows that the detection of propylene glycol in McKenzie's pure milk is due to the over-use of food additives flavoring in the production process.

As the incident continues to getting worse, the topic of "Xinjiang Mackenzie's pure milk failed" is on hot search.

Netizens immediately burst into flames: what is propylene glycol? What are the consequences of drinking milk containing this substance?

What is propylene glycol?


Propylene glycol (PROPYLENE GLYCOL) is colorless, almost odorless,ethanol with good solubility, miscible with water, and many organic solutions.

According to "GB 2760-2014 Food Safety National Standard for Food Additive Use", the functions of propylene glycol are: stabilizer and coagulant, anti-caking agent, defoamer, emulsifier, moisture retention agent, and thickening agent.

  Propylene glycol is a "permitted synthetic fragrance" and many flavors and fragrances use it as a solvent.  

  Propylene glycol is approved for use as a food additive by national standards, and the dosage limits in raw and wet pasta products and cakes are 1.5 g/kg and 3 g/kg, respectively.    

  Propylene glycol should not be used in pure milk.  

Food safety is the bottom line, and we need to use scientific means to figure out what we're putting in our stomachs!

Let's learn together the method for the determination of propylene glycol in milk.

Note: Method from "GB 5009.2016 National Standard for Food Safety Determination of 1,2-propanediol in Food.


Sample preparation process

In the laboratory, it is easy to find that the vortex mixer is a universal instrument and will be used very frequently.


MultiVortex Shakers & Mixers

Circular vortex oscillation can fully mix the sample matrix with solvent, dispersed filler and extraction salt in liquid phase and solid liquid, and is often used in sample preparation processes such as food, fertilizer, cosmetics, biological tissues, etc. In recent years, among the emerging QuEChERS rapid sample preparation technologies, the MultiVortex shakers & mixer can reach higher rotating speed on the basis of high-throughput preparation, and realize multi-stage automatic variable-speed vortex operation easily.

Performance advantages

1)High throughput, compatible with various specifications of sample tubes, also the glass tubes

2)Adjustable speed range: 200-3000rpm, easy to handle all kinds of insoluble samples.

3)Provide a stable amplitude of 3mm to ensure that each sample is well mixed.

4)The machine is compact, can save the space, with low center of gravity design in the main engine, low operating noise.

5)Intelligent terminal control:

●5-inch HD color touch screen

●Real-time display of speed and running time,we can start and stop at any time.

●12 kinds of vortex methods can be preset, and each method can have 6-stage automatic transmission.

Back to the original question: What would happen if you drink pure milk with propylene glycol?

Glycol, like alcohol, has an impact on the nervous system of human body and has certain irritation, but the impact is generally very small. The Joint Expert Committee on Food Additives (JECFA) under the United Nations Food and Agriculture Organization (FAO) and the World Health Organization (WHO) formulated the safety standard of propylene glycol: the daily intake per kilogram of body weight should not exceed 25mg. According to the toxicological data, it is roughly estimated that a person weighing 60 kilograms will "exceed the standard" only if he drinks 4.7 kilograms of milk every day.

Therefore, even after drinking milk containing propylene glycol, the risk of poisoning needs to be established in two dimensions: long-term and excessive intake. Judging from the propylene glycol content in this illegal milk, consumers don't have to worry too much if they drink it normally.

Warm tips

Milk smells too fragrant doesn't mean it is better.It mostly added with spices or additives . Normal milk, with only a faint scent of frankincense, tastes delicious, refreshing, not sticky.


Detelogy was founded in 2011, situated in Guangzhou, China, integrates R&D, is a high-tech enterprise dedicated to more intelligent and more efficient laboratory solutions. The main products include intelligent sample pretreatment equipment, laboratory automatic intelligent platform equipment, etc. The company integrates R&D, production, sales and after-sales maintenance services, and has established strict quality control and perfect customer service system.
We commit ourselves to practicing artificial intelligence in the field of laboratory testing. Enhance user experience to meet the needs of laboratory customers. We have provided high-quality intelligent laboratory products and a full range of services for many users around the world

Address:Guangzhou Detelogy Technology Co., Ltd

Room 705, Building 25, No.555, North Panyu Av, Guangzhou,

Guangdong , China 511400 

Tel:400-017-1158

URL:www.detelogy.com

E-mail: dt@detelogy.com