User manual

Agilent 1260 Infinity High Performance Autosampler User Manual 201
Appendix
14
Use of Solvents
Use of Solvents
Observe the following recommendations on the use of solvents.
• Brown glass ware can avoid growth of algae.
• 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 sulfuric acid and nitric
acid, especially at higher temperatures (if your chromatography
method allows, replace 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,
• Chromatographic grade ethers, which can contain peroxides (for
example, THF, dioxane, di-isopropyl ether) such ethers should be
filtered through dry aluminium oxide which adsorbs the peroxides,
• Solvents containing strong complexing agents (e.g. EDTA),
• Mixtures of carbon tetrachloride with 2- propanol or THF.