TBN Titration

klsscrMember

Using Metrohm Titrator with Tiamo software. ASTM D4739 method. Solvents and electrolyte have been validated. Electrode is fairly new. Test will pass QC perfectly and then fails after samples are run. Either as invalid or too low. When QC is run immediately after electrode cleaned with IPA will pass 75% of the time. Suggestions on troubleshootig?

8/27/136:02 PM

Original Post

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