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【Daily Question】Chemical Analysis Edition, 2021.5.11

2021-05-11View Original

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According to the GB/T6536 testing method, if the vapor pressure of the sample at 37.8°C is < 65.5 kPa, the initial boiling point is ≤ 100°C, and the final boiling point is > 250°C, then the temperature of the cold bath is required to be , and the time taken to start heating until the initial boiling point is reached is . The inner diameter of the asbestos gasket used is . A、0-5 5-10 50 B、0-1 2-5 38 C、0-60 5-15 50 D、0-5 5-10 38A

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