TORAST-H Glass Vial
Features Low adsorption vessels treated specially
Minimized adsorption of bases, acids and neutrals
Superior quality control
TORAST -H Glass Technology eliminates the risk of adsorption to the glass surface of the vials
Glass, the material of vials, contains metal oxides. Oxides of metals have a high ionizing tendency to be Si-O-M (metal silanolate), which may cause ionic adsorption with basic compounds in the sample. TORAST-H Glass Technology uses special processing to remove metals from the glass and suppress adsorption of basic compounds.
Minimized adsorption of bases, acids & neutrals
In general, giving a positive charge to the glass surface suppresses the adsorption of the basic compounds, but conversely, it causes the adsorption of the acidic compounds. TORAST-H Glass Vials minimize adsorption of both types of compounds.
Amitriptyline (Basic Compound)
Benzoic Acid (Acidic Compound)
uV
uV
2500
Control
Control TORAST-H Glass Vial
1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750
TORAST-H Glass Vial
2250
2000
1750
Recovery: 99.1%
Recovery: 99.5%
1500
1250
1000
750
500
250 500 750
250
0
-250 0
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
min
1.125 1.150 1.175 1.200 1.225 1.250 1.275 1.300 1.325 1.350 1.375 1.400 1.425 1.450 1.475 1.500 min
Benzyl Alcohol (Neutral Compound)
uV
Control TORAST-H Glass Vial
2000
1750
1500
Recovery: 99.8%
1250
1000
750
500
250
0
0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 1.125 1.150 1.175 1.200 1.225 min
Low adsorption for long-term storage
When a sample is stored in a general vial for a long time, the sample may adsorb into the surface of the vial, causing the reproducibility to be poor. The TORAST-H Glass Vial contains low adsorption characteristics that makes it excellent for long term sample storage.
Basic Compound A (log P 4.5, pKa 10.5)
100
TORAST-H-Glass Vial
80
60
Glass Vial A
40
20
Glass Vial B
Glass Vial C
0
0hr
24hr
48hr
1week 1month 3month
Adsorption test for long-term storage
Pg B-6
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