Price of the test:
Please enquire our customer service at

Acceptable Matrices:
Our accreditation covers: milk, milk powders, infant formula

Limit of Detection:
Any concentration greater than 3 mg/100 g is detectable.

Sample Size Requirements:
50 grams of sample is needed.

UV/VIS Spectrophotometer

Reportable Units:
mg/100 g

Turn Around Time:
7 Business Days

Is Urgent Service Available?
No (Enquire our customer service for special requirements at

Method Reference:
GB 5413.20-2013

Method Description:
Testing reports values for choline and choline hydroxide. Following an acid hydrolysis, free choline is oxidized by enzyme, then dyed by chromogenic reagent. Chromogenic reaction product is measured by UV-Vis spectrophotometer.

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