The 5-Second Trick For principle involved in limit test for heavy metals
(To the determination of lead in iron salts use 10 ml of ammonium citrate Answer). Incorporate two drops of phenol red Resolution and make the solution just alkaline (purple in coloration) with the addition of potent ammonia Alternative. Amazing the answer if needed and insert 2 ml of potassium cyanide Alternative.This test is predicated on the rea