Veo Observer Plus Instruções de Operação descarregar pdf (Página 13)

Charged Aerosol Detectors

Corona Veo and Corona Veo RS

Operating Instructions Page 5

• Hazardous gases

Install the HPLC system in a well-ventilated laboratory. If the mobile phase or sample

includes volatile or flammable solvents, do not allow them to enter the workspace. If the

mobile phase or sample includes volatile or flammable solvents, avoid open flames and

sparks.

The exhaust gas may contain hazardous fumes. To avoid an accumulation of the exhaust

gasses, make certain that the exhaust gas is absorbed by a fume hood or other ventilating

device. Maintain a well-ventilated laboratory. Do not vent directly into the laboratory.

• Electrostatic discharge

Discharge of electrostatic energy may lead to sparking and can constitute a fire hazard.

This effect is particularly pronounced in insulating capillaries und with non-conductive

solvents (for example, pure acetonitrile).

Take appropriate measures to prevent the generation of static electricity near the HPLC

system. For example, make sure that the air humidity level in the laboratory is

sufficiently high and provide proper ventilation, wear anti-static clothing or shoes,

prevent accumulation of air bubbles in waste lines, and use grounded waste containers.

Use only non-conductive capillaries to direct solvents into the waste container. With

electrically conductive capillaries, make sure that they are properly grounded.

• Self-ignition of solvents

Do not use solvents for which the self-ignition temperature is below 150 °C. In case of

leakage, these solvents may self-ignite on a hot surface.

• Capillaries, capillary connections, open connections

♦ Capillaries, especially non-metallic capillaries may burst, slip out of their fittings or

may not be screwed in. This may result in substances spraying out of the open

connections.

♦ In an UltiMate 3000 system, some components are made of PEEK™. This polymer

has superb chemical resistance to most organic solvents. However, it tends to swell

when in contact with trichlormethane (CHCl

), dimethyl sulfoxide (DMSO), or

tetrahydrofuran (THF). In addition, it is attacked by concentrated acids, such as,

sulfuric acid and nitric acid or a mixture of hexane, ethyl acetate, and methanol. In

both cases, capillaries may start leaking or they can burst. Swelling or attack by

concentrated acids is not a problem with brief flushing procedures.

♦ Do not use tubing that is stressed, bent, kinked, or damaged.

♦ Capillary connections can be contaminated by harmful substances or harmful

substances can escape from open connections.

♦ Always wear safety glasses when handling fused silica tubing, for example, during

installation or when cutting capillaries to the length.

• Disconnect the detector from all power sources before removing the panels. When the

panels are removed, dangerous electrical connections will be exposed.

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Veo Observer Plus Instruções de Operação Página 13