Establishes criteria for the purity and describes the test methods for identity tests, residue after ignition, heavy metals content, iron content, appearance of solution. Annex A describes preparation of the standard ammonium cerium(IV) hexanitrate solution.
Số hiệu tiêu chuẩn
ISO 423
Tên tiêu chuẩn
Photography; processing chemicals; specifications for hydroquinone
Ngày phát hành
1994-05-00
Tiêu chuẩn tương đương
BS ISO 423 (1995-03-15), IDT * GB/T 22392 (2008), IDT
Từ khóa
Chemical analysis and testing * Chemical reagents * Chemicals * Degree of purity * Hydro-quinoline * Materials specification * Photographic materials * Photography * Purity criterion * Specifications * Testing * Tests