Name:
ISO 2072:1981 PDF
Published Date:
08/01/1981
Status:
[ Withdrawn ]
The 1-(2-pyridilazo)-2-naphthol method is applicable to products having zinc contents in the range between 0,002 % (m/m) and 0,12 % (m/m). Alkaline fusion of a test portion, and dissolution of the fused mass in nitric acid. Separation of the zinc in the form of its thiocyanate by extraction with 4-methylpentan-2-one. Re-extraction of the zinc with an aqueous hydrochloric acid solution. Formation of the PAN-zinc complex, at pH 7,5, in the presence of tartaric acid, sodium thiosulphate and 1-nitrose-2-naphthol-3,6-du
| File Size : | 1 file , 410 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 5 |
| Published : | 08/01/1981 |
