International Organization for Standardization (ISO)
Latest
ISO 7431-1:2024
Scope
The document specifies test methods for industrial thiourea properties, such as thiourea content, water insoluble substance, ignition residue, initial melting point, turbidity, thiocyanate content, calcium element and heavy metals.
ISO 7431-1:2024 Referenced Document
ISO 10304-3:1997 Water quality - Determination of dissolved anions by liquid chromatography of ions - Part 3: Determination of chromate, iodide, sulfite, thiocyanate and thiosulfate
ISO 11885:2007 Water quality - Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES)
ISO 14911:1998 Water quality - Determination of dissolved Li<(hoch)+>, Na<(hoch)+>, NH<(Index)4><(hoch)+>, K<(hoch)+>, Mn<(hoch)2+>, Ca<(hoch)2+>, Mg<(hoch)2+>, Sr<(hoch)2+> and Ba<(hoch)2+> using ion chromatography - Method for water and waste water
ISO 3165 Sampling of chemical products for industrial use; Safety in sampling
ISO 3696 Water for analytical laboratory use; Specification and test methods
ISO 6353-1:1982 Reagents for chemical analysis; Part 1 : General test methods
ISO 7027-1 Water quality - Determination of turbidity - Part 1: Quantitative methods
ISO 7980:1986 Water quality; Determination of calcium and magnesium; Atomic absorption spectrometric method
ISO 8213 Chemical products for industrial use; Sampling techniques; Solid chemical products in the form of particles varying from powders to coarse lumps
ISO 7431-1:2024 history
2024ISO 7431-1:2024 Thiourea for industrial use — Part 1: Test methods
2023ISO 7431-1:2023 Thiourea for industrial use — Part 1: Test methods