Agilent Cary 8454 UV-Visible Spectroscopy System Operator’s Manual 13
Safety Information 1
Precautions
Capacitors inside the instrument may still be charged, even though the
instrument has been disconnected from its source of supply. Dangerous
voltages, capable of causing serious personal injury, are present in this
instrument. Use extreme caution when handling, testing and adjusting.
Solvent Information
Flow Cells
Avoid the use of alkaline solutions (pH > 9.5) which can attack quartz and thus
impair the optical properties of flow cells.
Solvents
Always filter solvents, small particles can permanently block 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 analysis 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:
2CHCl3 + O2
2COCl2 + 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.
Organic and aqueous solvents can be hazardous if handled improperly. Always follow
the precautions listed below to protect both operator and instrument.
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