Detection Related Standards of Propylene Glycol and column

Does the child need to worry about drinking this “problem milk”?

Experts generally believe that parents should not be too anxious about whether milk containing propylene glycol will harm children’s health.

The safe dosage standard of propylene glycol formulated by the International Joint Expert Group on Food Additives (JECFA) is: the intake per kilogram of body weight per day does not exceed 25 mg.

According to expert analysis, according to the propylene glycol content (0.32 g/kg) detected in Mai Qier pure milk:

A 60kg person needs to drink 4.7kg a day to “exceed the standard”.

A child weighing 30 kilograms drinks 2.3 kilograms a day, which is still within the “safe range”.

I have this milk at home.

Can it be given to children?

Experts said that although it takes a certain amount of propylene glycol-containing Maiquor milk to exceed the standard, it is still a “substandard product”.

As a supplier of analytical science and technology solutions, Welch Materials has sorted out experimental analysis plans for propylene glycol detection, providing a helping hand for experimental workers who are currently conducting detection work.

Determination of 1,2-propanediol in milk lab report on WM-InoWAX

Reference standard GB 5009.251-2016

Chromatographic condition 1

Chromatographic column: Welch WM-InoWAX (60m×0.25mm, 0.25μm).

Inlet: 230℃
Detector: FID 240℃
Carrier gas: nitrogen
Column flow rate: 1.0mL/min
Split ratio: 10:1
Injection volume: 1 μL
Hydrogen: 30mL/min
Air: 300mL/min

Analysis result table

Retention time	Peak height	Peak area
9.36	2.27	5.46

Column System Evaluation Form

Retention time	Capacity factor	Theoretical plate	Degree of separation	Tailing factor
9.36	0.00	361104	0.00	1.38

Chromatographic condition 2

Chromatographic column: Yuexu WM-InoWAX (30m×0.25mm, 0.25μm).

Rate (℃/min)	Temperature (℃)	Hold time (min)
/	80	1
20	160	2
15	220	30

Inlet: 230℃
Detector: FID 240℃
Carrier gas: nitrogen
Column flow rate: 1.0mL/min
Split ratio: 10:1
Injection volume: 1 μL
Hydrogen: 32mL/min
Air: 200mL/min

Retention time	Area	Height	Theoretical plate	Tailing factor
6.43	3920	1533	177320	1.573

Using Welch WM-InoWAX (60m×0.25mm, 0.25μm) and Welch WM-InoWAX (30m×0.25mm, 0.25μm) chromatographic columns, measured under the standard GB 5009.251-2016 conditions, can meet the detection requirements.