Method for determining molybdenum and titanium elements in low alloy steel by adopting shared mother liquor

• Main Authors: WANG CUNFA, ZHANG RUPENG, ZHANG JUNJIE, ZHAO HAIYAN, QI XUCHENG, YAO CHANGFA, MA SHANGQING, ZHANG SHENGPING, GUO SHOUGUI, LI WENWEN
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining molybdenum and titanium elements in low alloy steel by adopting a shared mother liquor. The method comprises the following steps: 1) preparing the mother liquor: adding nitric acid, heating and dissolving, adding a sulfuric acid solution when a sample is completely dissolved and a big bubble phenomenon appears, continuously heating, adding water to dissolve the salt when salt crystals appear at the bottom of a bottle, dry and solid salt is discharged and no flowing solution exists at the bottom of the bottle, taking down and slightly cooling to room temperature after big bubbles appear during dissolving, adding water to a constant volume, and uniformly mixing; 2) determining molybdenum: adding sulfuric acid, ammonium thiocyanate and an ascorbic acid solution into the mother liquor, diluting with water to a scale, uniformly mixing, standing at room temperature for 10 to 20 minutes, and measuring the absorbance; and 3) determining titanium: adding ascorbic acid,