Agilent 1260 Infinity VWD User Manual 199
Appendix
13
Solvent Information
Solvent Information
Observe the following recommendations on the use of solvents.
Flow Cell
Avoid the use of alkaline solutions (pH > 9.5 ) which can attack quartz
and thus impair the optical properties of the flow cell.
Prevent any crystallization of buffer solutions. This will lead into a
blockage/damage of the flow cell.
If the flow cell is transported while temperatures are below 5 °C, it must
be assured that the cell is filled with alcohol.
Aqueous solvents in the flow cell can built up algae. Therefore do not
leave aqueous solvents sitting in the flow cell. Add small % of organic
solvents (for example, acetonitrile or methanol ~5 %).
Solvents
Brown glass ware can avoid growth of algae.
Always filter solvents, small particles can permanently block the
capillaries. Avoid the use of the following steel- corrosive solvents:
• Solutions of alkali halides and their respective acids (for example,
lithium iodide, potassium chloride, and so on).
• High concentrations of inorganic acids like nitric acid, sulfuric acid
especially at higher temperatures (replace, if your chromatography
method allows, by phosphoric acid or phosphate buffer which are less
corrosive against stainless steel).
• Halogenated solvents or mixtures which form radicals and/or acids, for
example:
2CHCl
3
+ O
2
→ 2COCl
2
+ 2HCl
This reaction, in which stainless steel probably acts as a catalyst,
occurs quickly with dried chloroform if the drying process removes the
stabilizing alcohol.
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