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1 Scope This document specifies a spectrophotometric method by using 4-(2-pyridylazo)-resorcinol (PAR) for the determination of niobium in steel. The method is applicable to all types of steel with n…
Overview ISO 9441:2026 specifies a standardized spectrophotometric method for the determination of niobium content in steel using 4-(2-pyridylazo)-resorcinol (PAR). Developed by the International Org…
Overview ISO 9441:1988 is an international standard published by the International Organization for Standardization (ISO). It defines a PAR spectrophotometric method for the precise determination of…