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3.6 Before Analysis
Usable
Phosphoric acid
Sodium phosphate
Table 3-1 Reagents Restricted in Use as Mobile Phase
Usable below 50%
Usable below 10%
Acetic acid
Disodium phosphate
Ammonium citrate
Ammonium formate
Ammonium nitrate
Ammonium perchlorate
Citric acid
Ammonium phosphate
monobasic
Butyric acid
Boric acid
Sodium nitrate
Formic acid (up to pH3)
Hydrochloric acid (up to
pH3)
Potassium nitrate
Sodium hydrogen
carbonate
Sodium carbonate
Other reagents which can corrode SUS 316 must not be used.
Also attention should be paid to solvent viscosity, because liquid
delivery is disabled by use of a highly viscous solvent.
3 - 52
Undesirable for SUS 316
Ammonium chloride
Potassium chloride
Sodium chloride
Trifluoroacetic acid
(Note 1)
Maximum concentration
of the above reagents
should be limited to 5 -
6%.
(Note 2)
If the above reagents
were used unavoidably,
be sure to wash the
entire flow path
adequately with distilled
water.
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