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Absorption test

Bio-fresh absorption test results

FACTS OF THE CASE
Test of the absorption capacity of Ethanol and Ethylene of the Bio Fresh Masterbatch additive at room temperature.
TEST MATERIAL
5 kgs Masterbatch, white cylinders, diameter approx. 3 mm length approx. 3 mm, shrink-wrapped in Polyethylene bag.
TEST METHOD
Determination of the absorption capacity.
5 - 10 g Masterbatch had been dried during 3 hours at 105⁰ C in the dry-cupboard and afterwards transferred into a top-opened receptacle in an Exsikkator (volume approx. .4,8 1).

Determination of the Ethylene absorption.

The Exsikkator was rinsed with Ethylene and stored during altogether 30 days. The Determination of Ethylene absorption had been done gravimetricallyl and also via GC. The gaschromatographical determination was done via Headspace-technology (heating up to 90⁰ C, 30 min.) on a gaschromatopgraph, instrument no.: 319, separation column: B. There were done 4 determinations at atime.

Determination of the Ethanol absorption

An open receptacle with absolute Ethanol was put into the Exsikkator and stored for 25 days totally. The determination of Ethanol absorption had been done gravimetrically and also via GC. The gaschromatographical determination was done via Headspace-technology (heating up to 90⁰ C, 30 min.) on a gaschromatopgraph, instrument no.: 319, separation column: GS-B. There were done 4 determinations at a time.

TEST RESULTS

GRAVIMETRICAL DETERMINATION
OF ETHANOL - AND ETHYLENE ABSORPTION
TABLE # 1
GRAVIMETRICAL DETERMINATION OF ETHANOL
AFTER A 25-DAY PERIOD OF STORAGE

 

SAMPLE NUMBER	WEIGHT BEFORE TEST	WEIGHT AFTER TEST	INCREASE IN WEIGHT (g)	INCREASE IN WEIGHT (%)
1	7,3870	7,6201	0,233	3,16
2	7,4052	7,6441	0,2389	3,23
3	6,5840	6,7959	0,2119	3,22
4	7,3344	7,5679	0,2335	3,18
MW				3,20
S				0,03

TABLE # 2
GRAVIMETRICAL DETERMINATION OF ETHYLENE ABSORPTION
AFTER A 30-DAY PERIOD OF STORAGE

 

SAMPLE NUMBER	WEIGHT BEFORE TEST	WEIGHT AFTER TEST	INCREASE IN WEIGHT (g)	INCREASE IN WEIGHT (%)
1	5,8927	5,9205	0,0278	0,47
2	5,7042	5,732	0,0278	0,49
3	6,0087	6,0530	0,0443	0,74
4	6,7106	6,7566	0,0460	0,69
MW				0,60
S				0,14

GASCHROMATOGRAPHICAL DETERMINATION
OF ETHANOL AND ETHYLENE ABSORPTION
TABLE # 3
GASCROMATOGRAPHICAL DETERMINATION OF THANOL-ABSORPTION
AFTER A 25-DAY PERIOD OF STORAGE

SAMPLE NUMBER	WEIGHT BEFORE TEST	CONTENT (mp)	CONTENT (%)
1	1,0144	22,4	2,20
2	1,2207	28,8	2,36
3	1,0335	22,3	2,16
4	0,9843	18,1	1,84
MW			2,14
S			0,22

TABLE # 4
GASCHROMATOGRAPHICAL DETERMINATION OF ETHYLENE ABSORPTION AFTER A 30-DAY PERIOD OF STORAGE

SAMPLE NUMBER	WEIGHT BEFORE TEST	CONTENT (mp)	CONTENT (%)
1	1,6040	2,1	0,60
2	1,0377	6,3	0,60
3	1,3068	8,1	0,62
4	1,5003	9,2	0,61
MW			0,54
S			0,14

Conclusion

The tested Bio fresh Masterbatch shows an Ethanol absorption of 2,14 +/- 0,22 Gew % after a 25-day lasting storage period at room temperature in saturated Ethanol atmosphere. The Ethylene absorption amounts to 0.54 +/- 0,14 Gew % after a 30-day lasting storage period at room temperature in Ethylene atmosphere. The measured values gained during the gravimetrically test especially of Ethanol are somewhat higher than the gaschromatographical values. The reason for this result is, that also the water absorption is measured while the gravimetrical method.

Grofit Plastics August, 1999.