An employee was preparing to sample a cylinder containing approximately 700 to 1,000 cubic centimeters of liquefied petroleum gas (LPG) to run an analysis for sulfur content. The employee was loading the sample into the testing instrument when he noticed it was leaking at the fitting. Some of the LPG discharged from the cylinder and ignited. The employee was hospitalized with first- and second-degree burns to his face (cheek, chin, lips, and nose) and hands.