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Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual
83
Preparing the Module
4
Solvent Information
solvents used in chromatographic systems like methanol, acetonitrile and
isopropanol. It has limited stability with aliphatic, aromatic and halogenated
hydrocarbons, THF, phenol and derivatives, concentrated acids and bases. For
normal phase applications, the maximum pressure should be limited to 200 bar.
Tantalum (Ta)
Tantalum is inert to most common HPLC solvents and almost all acids except
fluoric acid and acids with free sulfur trioxide. It can be corroded by strong
bases (e.g. hydroxide solutions > 10 %, diethylamine). It is not recommended for
the use with fluoric acid and fluorides.
Stainless Steel (ST)
Stainless steel is inert against many common solvents. It is stable in the presence
of acids and bases in a pH range of 1 to 12.5. It can be corroded by acids below
pH 2.3. It can also corrode in following solvents:
•
Solutions of alkali halides, their respective acids (for example, lithium iodide,
potassium chloride, and so on) and aqueous solutions of halogens.
•
High concentrations of inorganic acids like nitric acid, sulfuric acid and
organic solvents 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:
2 CHCl
3
+ O
2
→
2 COCl
2
+ 2 HCl
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-isopropylether). Such ethers should be filtered through dry
aluminium oxide which adsorbs the peroxides.
•
Solutions of organic acids (acetic acid, formic acid, and so on) in organic
solvents. For example, a 1 % solution of acetic acid in methanol will attack
steel.
•
Solutions containing strong complexing agents (for example, EDTA, ethylene
diamine tetra-acetic acid).
•
Mixtures of carbon tetrachloride with 2-propanol or THF.
Содержание G7121A
Страница 86: ...86 Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual 4 Preparing the Module Solvent Information ...
Страница 230: ...230 Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual 10 Parts for Maintenance and Repair Kits ...
Страница 264: ...264 Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual 12 Hardware Information Early Maintenance Feedback ...
Страница 281: ...Agilent InfinityLab LC Series 1260 Infinity II FLD User Manual 281 Index ...