June 28, 2016, 715003956 Rev. C
Page 73
C.3.2
Solvents used to prepare mobile phases
The table below lists solvents and reagents used commonly to prepare mobile phase and, in some
cases, act as sample diluents. They are not expected to adversely affect the performance of the
materials shown in the table on
Note:
The list of solvents and chemicals and their associated concentrations shown below
presents the levels which have been tested, assessed, or both, for chemical compatibility with the
materials of construction. It is not a recommendation for optimal electrospray sensitivity.
Mobile-phase component concentration affects electrospray efficiency and sensitivity. Therefore,
keep modifier and buffer concentrations to the lowest levels that maintain chromatographic
resolution.
O-rings
Viton
®
or
PTFE (polytetrafluoroethylene)-
encapsulated Viton
Solvent waste/leak management
Fluorinated ethyline polymer (FEP) tubing
Source enclosure
Aluminium
Waste bottle
Polypropylene
Pumping Block gaskets
FEPM
Waste bottle push-in fittings
NBR (nitrile butadiene rubber), SST (stainless
steel), PBT (polybutylene terephthalate), and
POM (polyoxymethylene)
Notice:
For LC/MS operation, do not prepare mobile phases using normal-phase
solvents, like hexane. Such solvents adversely affect the performance of the materials
named in the list of items exposed to solvents, on
, and should not be used
except at or below the concentrations specified. In the event the solvents are used, at
reduced concentrations, as additives to mobile phases or as sample diluents, you must
evaluate the consequent compatibility issues.
Table C–2:
Solvents used to prepare mobile phases (KAD)
Solution
Concentration
Water
100%
Methanol 100%
Acetonitrile
100%
Ethanol
100%
Isopropanol 100%
Propanol
100%
Formic acid
≤
0.5%
Acetic acid
≤
1%
Trifluoroacetic acid (TFA)
≤
0.2%
Table C–1:
Items exposed to solvent (KAD) (Continued)
Item
Material
Содержание ACQUITY QDa
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