Australian Capital Territory Current Regulations Australian Capital Territory Current RegulationsSchedule 5 Method of treatment of a lead compound for the purpose of determining the percentage of dry compound of lead
1 the material is to be treated with suitable solvents to remove the oil, varnish, and other media, and the residue to be dried at 100° C and thoroughly mixed
2 a weighed quantity of this extracted, dried and mixed material is to be continuously shaken for 1 hour, at the common temperature, with 1 000 times its weight of an aqueous solution of hydrochloric acid containing 0.25% by weight of hydrogen chloride
3 this solution is then to be allowed to stand for 1 hour and then filtered
4 the lead salt contained in the clear filtrate is then to be precipitated as lead sulphide and weighed as lead sulphate