Calcination Temperature's Impact on the Determination Result of Sulfur in APT

Sulfur determination method in tungsten trioxide by high-frequency infrared carbon-sulfur analyzer. The effect of APT's calcination temperature on the sulfur content determination under the optimal instrument working conditions is studied. Experiments show the optimal calcination temperature of APT samples is 425℃. At the optimal temperature, water and NH3 in APT sample can be removed efficiently. In addition, the sulfur content in the sample can keep intact without decomposition and volatilization. The experimental results can truly reflect the determination of sulfur in APT sample. The sulfur determination scope ranges from 0.0005% to 0.3000%, and the recovery of standard addition is 98.6%.

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