How to detect whether the paper drum (box) for instant noodle packaging contains plasticizers?

With the acceleration of the pace of life and the need for travel, instant noodles have become one of the most common simple foods in
modern life.
Instant noodles are also known as fast food noodles, instant noodles, cup noodles, fast cooked noodles, instant noodles, instant noodles, the south is generally called bowl noodles, and Hong Kong is called doll noodles
.
It is a kind of noodle food
that can be soaked and eaten in hot water in a short period of time.
At present, the common outer packaging form of instant noodles is bagged and paper drum (box) is packed
.
Packaging refers to the overall name
of containers, materials and auxiliary materials used in accordance with certain technical methods in order to protect products in the circulation process, facilitate storage and transportation, and promote sales.
Instant noodle paper buckets (boxes) are a very convenient form of packaging, you only need to pour boiling water when eating, brewing can be eaten
.
There are many kinds of plasticizers used in the packaging process, and the common ones are phthalates esters
.
GB/T 21928-2008 "Determination of phthalates in food plastic packaging materials" specifies 16 test methods for phthalates: the plastic packaging is crushed into a single particle, extracted by n-hexane ultrasound, and then the extracted n-hexane solution is tested on a gas chromatography-mass spectrometer
.