Fig. 4From: Pneumoconiosis in a polytetrafluoroethylene (PTFE) spray worker: a case report with an occupational hygiene studya Thermogravimetric analysis of the patient’s personal air sample shows prominent weight loss at 550–660 °C. A total of 0.40994 mg of the sample weight was reduced at 550–600 °C. b Thermogravimetric analysis of the regional sample shows weight loss near 450 °C, and no prominent weight loss was found at 550–600 °C. c Thermogravimetric analysis of the PTFE spray solution shows prominent weight loss at 550–600 °CBack to article page