UNI 4781:1961
UNI · 1961-07-31
Procedures for chemical analysis of metals. Determination of arsenic in cadmium. Weight and colorimetric method.
1Key Takeaways
A nitric acid solution of the metal, quantitatively separate pentavalent oxidized arsenic by precipitating it with ferric hydroxide. Dissolve the precipitate in nitric acid and heat until white fumes appear. Distill the arsenic as trichloride and determine its weight for arsenic contents above 0.005%, or colorimetrical…
2Scope / Description
A nitric acid solution of the metal, quantitatively separate pentavalent oxidized arsenic by precipitating it with ferric hydroxide. Dissolve the precipitate in nitric acid and heat until white fumes appear. Distill the arsenic as trichloride and determine its weight for arsenic contents above 0.005%, or colorimetrically for arsenic contents not exceeding 0.005%. Equipment, procedures, calculations.
3Version History
UNI 4781:1961
1961-07-31
5Citation Network
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6Frequently Asked Questions
What is UNI 4781:1961?
UNI 4781:1961 — Procedures for chemical analysis of metals. Determination of arsenic in cadmium. Weight and colorimetric method. is an international standard developed by Ente Nazionale Italiano di Unificazione. A nitric acid solution of the metal, quantitatively separate pentavalent oxidized arsenic by precipitating it with ferric hydroxide. Dissolve the precipitate in nitric acid and heat until white fumes appear. Distill the arsenic as trichloride and...
What does UNI 4781:1961 cover?
This standard covers: A nitric acid solution of the metal, quantitatively separate pentavalent oxidized arsenic by precipitating it with ferric hydroxide. Dissolve the precipitate in nitric acid and heat until white fumes appear. Distill the arsenic as trichloride and determine its weight for arsenic contents above...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of UNI 4781:1961?
The current published version is UNI 4781:1961, published on 1961-07-31. Always check for amendments or pending revisions.
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