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candy (soft gum)

Protocol number:	M130163
Industry:	Foodstuffs
Feed Size:	25 mm
Desired Fineness:	< 100 µm
Quantity:	3 pcs
Recommendation:	We recommend using a Vibratory Micro Mill PULVERISETTE 0 for a grinding of embrittled sample. Because the ground gum candy particles use to stick together after warming, we recommend grinding right before analysis.

Result 1

	Vibratory Micro Mill PULVERISETTE 0 amplitude: 2,0 mm
Equipment:	mortar and grinding ball (50 mm Ø) made of stainless steel
Material attributes:	very soft sample
Feed quantity:	3 pcs. (~ 10 g)
Feed Size:	< 25 mm
Additive:	+ liquid nitrogen (N2)
Grinding time:	10 min
Final fineness:	powder
Comments:	Because the gum sample use to be very soft, only a grinding in liquid nitrogen comes into question. For this, we put the desired amount of sample into a grinding set of Mortar Grinder PULVERISETTE 2 and used the Cryo-Box for grinding with liquid nitrogen. Sample use to be reduced in size rapidly. For a finer result, we ground the sample for a total of 10 minutes. Afterwards, the sample use to be quite fine. The sample has been packed fast after grinding, because humidity use to condense quickly on cold particles. After the sample reached room temperature, particles have been sticking together again.
Pictures:	Soft sample of gum before grinding.
	Cryo-Box with mortar and sample inside (after 5 minutes of grinding).
	Opened Cryo-Box with ground sample after 10 minutes of grinding with liquid nitrogen. The present fineness can’t be determined (neither by sieving nor with or Laser Particle Sizer). After the sample will be at room temperature, particles will stick together.