Endress+Hauser Analytik Jena multi N/C, Руководство по эксплуатации, Страница: 52 / 106

Operation multi N/C pharma UV
52
6 Operation
6.1 General information for the analysis work
Observe the following during analysis:

When analyzing samples with high acidic or saline content, aerosol can be formed
in the TIC condensation vessel. The capacity of the halogen trap is depleted within
a relatively short time. The water trap also clogs up quickly. Both components have
to be renewed frequently if this is the case. Where possible such samples should be
diluted prior to the measurement (e. g. 1:10).

To acidify the samples, only sulfuric acid (H
2
SO
4
) p. A. c = 2 mol/l, prepared from
H
2
SO
4
p. A. (conc.) and TOC water may be used.

For the TIC detection only 10 % ortho-phosphoric acid (H
3
PO
4
), made from ortho-
phosphoric acid (concentrated) p. A. and TOC water, must be used.

Only clean, particle-free glass containers (volumetric flasks, vials) are to be used for
the creation and storage of substances.

When preparing and storing solutions in the range of < 1 mg/l it must be noted in
particular that the concentrations of the solutions may be slightly modified by
components of the laboratory air (CO
2
, organic vapors).
You can take the following precautions against this:

Keep the head room above the liquids as small as possible.

Cover the sample vials on the sample tray with foil during autosampler
operation (for example aluminum foil).

In manual mode aerate the head room of the sample:
Connect the aeration hose to the "pump" connection (5 in Fig. 13 p. 23) and
enter the other end of the aeration hose into the head room of the sample.
When aerating the head room do not submerge the aeration hose into the liquid.

Remove the source of organic vapors.
6.1.1 Reagents and materials required
The operator is responsible that everything not included directly in the scope of
delivery yet necessary for the operation of the analyzer will be available during the
installation of the device. This applies in particular to the first supply of consumables.
ATTENTION
The analyzer will be damaged if different reagents are used. Only the specified
reagents must be used!
The operator must provide the following reagents and materials:

only chemicals of the degree of purity "for analysis" may be used

only clean, particle-free glass containers (volumetric flasks, vials) may be used for
the preparation and storage of the solutions.