Gold is insoluble in nitric acid , which dissolves silver and base metals , a property that has long been used to refine gold and to confirm the presence of gold in metallic substances, giving rise to the term acid test .
Igolide alincibiliki ku-nitric acid, elincibilikisa izinsimbi zesiliva nezisekelo, impahla osekuyisikhathi eside isetshenziselwa ukucwenga igolide nokuqinisekisa ubukhona begolide ezintweni ezisansimbi, okwenza igama elithi acid test.