7. Performance characteristics ABL90 FLEX reference manual
7-28
ctBil is slightly sensitive to pH deviations from the nominal value of pH = 7.4.
General reference: [Ref. 12]
Anticoagulants containing sodium salts give erroneously high cNa
+
results. Sodium
fluoride with or without EDTA and oxalate (disodium) affects
cGlu results. Sodium
fluoride gives erroneously high
cNa
+
and low cCa
2+
, cGlu and cLac results. Trisodium
citrate affects
cNa
+
, cK
+
and cGlu results.
Radiometer, therefore, recommends the use of heparin as the only anticoagulant.
WARNING -
Risk of erroneous results
Do not use EDTA, as it leads to erroneous pH, pCO
2
, cNa
+
, cK
+
and cCa
2+
results. Use of EDTA will also affect subsequent measurements on the Ca
electrode and it will reduce the lifetime of this electrode.
Anticoagulants
(sampling)
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