Metrohm 850 Professional IC AnCat Nonsuppressed - Manual (Page 93)

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6 Troubleshooting
850 Professional IC–AnCat – non-suppressed
￭￭￭￭￭￭￭￭ 83
Problem Cause Remedy
Sample – Blockage in the
sample path. Check the sample path.
Sample – Sample loop not
(completely) filled. Prolong the sample transfer time.
Sample – Gas bubbles in
the sample. Use the sample degasser (see Chapter 3.13,
page 43) (if available).
Very noisy baseline High pressure pump – con-
taminated pump valves. Clean pump valves (see Chapter 5.5.2, page
64).
Eluent – Leak in the eluent
path. Check the eluent path.
Eluent – Blockage in the
eluent path. Check the eluent path.
High pressure pump –
defective piston seals. Replace piston seals (see Chapter 5.5.2, page
64).
Pulsation damper not con-
nected. Connect the pulsation damper (see Chapter
3.12, page 41).
Pulsation damper not con-
nected. Connect pulsation damper (see Chapter 3.12,
page 41).
Background conduc-
tivity too high Incorrect eluent. Change eluent (see Chapter 5.4.2.3, page 63).
Data of the separa-
tion column cannot
be read. Column chip contamina-
ted. Clean contact surfaces of the column chip
(with alcohol).
Column chip defective. 1. Save column configuration in MagIC Net.
2. Notify Metrohm Service.
Individual peaks
greater than expec-
ted Sample – Carry-over of the
samples from previous
measurement. Rinse system longer between two samples.
Poor reproducibility
of the retention
times Eluent – Leak in the eluent
path. Check the eluent path.
Eluent – Blockage in the
eluent path. Check the eluent path.
Chromatograms
have poor resolution Separation column –
diminished separating effi-
ciency. ￭ Regenerate separation column (see Chap-
ter 5.12.4, page 80).