C
Is there any relationship between the amount of air supplied at the time of cupellation and the retention of base metals on the check. Why am asking this because last time, accidentally, i got increased the blower, which supply oxygen at the time of oxidation, and ended in high retention on the check sample; 0.9979 for the first proof and 0.9985 for the second proof. After that i regulated the air flow to a low limit, this time check showed high loss. How could i tackle this kind of tricky situation at the time of cupellation.