Page 134 - Shimadu Consumables Catalog

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 Amitriptyline (Basic Compound) Benzoic Acid (Acidic Compound)
uV 2500 uV
suppresses the adsorption of the basic compounds, but 4500 Control 2250 Control
4750
4250
4000 TORAST-H Glass Vial TORAST-H Glass Vial
3750 2000
conversely, it causes the adsorption of the acidic compounds. 3500 3250 Recovery: 99.1% 1750 Recovery: 99.5%
3000 1500
2750
TORAST-H Glass Vials minimize adsorption of both types of 2500 2250 1250
1750 2000 1500 1000
compounds. 1250 1000 750 500
750
500 250
250
0 0
-250
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
2000 Control
1750 TORAST-H Glass Vial
Recovery: 99.8%
1500
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 Basic Compound A (log P 4.5, pKa 10.5)
sample may adsorb into the surface of the vial, causing the 100
reproducibility to be poor. The TORAST-H Glass Vial contains low TORAST-H-Glass Vial
adsorption characteristics that makes it excellent for long term 80
sample storage. 60
Recovery (%) 40 Glass Vial A
20
Glass Vial B
Glass Vial C
0
0hr 24hr 48hr 1week 1month 3month
Adsorption test for long-term storage

Pg B-6