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首页> 外文会议>Proceedings of the 43rd annual loss prevention symposium >EVALUATION OF EOUILBRIUM TOXICITY HAZARDS USING 'INFINITE POINTS'
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EVALUATION OF EOUILBRIUM TOXICITY HAZARDS USING 'INFINITE POINTS'

机译：使用“无限点”评估中毒毒性危害

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For evaluation of the inhalation toxicity hazards to which a worker could be exposed, it is necessary to know (1) the concentration of the gas or vapor in the surrounding atmosphere and (2) the concentration that would be hazardous. Where there is liquid in an unventilated enclosed space, the maximum concentration would be determined from the vapor pressure of the liquid at the temperature within the enclosure. For many chemicals, the relationship between temperature and vapor pressure is not known over a wide range. If the boiling point is known, or if the vapor pressure at a given temperature is known, an approximate relationship between vapor pressure and temperature can be obtained through the use of an "infinite point".rnThis paper presents "infinite points" for a variety of compounds (as developed by previous investigators) and the equations that can be used to estimate the vapor pressure (and, thereby, the concentration) at any temperature. If the relationship between atmospheric concentration and toxic concentration can thus be evaluated, the required "protection factor" for respiratory equipment can then be determined. Similarly, if the approximate vapor-pressure/temperature relationship is known for a material, the flash point can be estimated.
机译：为了评估工作人员可能遭受的吸入毒性危害，有必要知道（1）周围大气中气体或蒸气的浓度，以及（2）有害的浓度。在没有通风的密闭空间中有液体的地方，最大浓度将根据外壳内温度下液体的蒸汽压来确定。对于许多化学品，在很宽的范围内都不知道温度和蒸气压之间的关系。如果已知沸点，或者已知给定温度下的蒸气压，则可以通过使用“无限点”获得蒸气压与温度之间的近似关系。rn本文介绍了各种温度的“无限点”。化合物（由先前的研究人员开发）以及可用于估算任何温度下的蒸气压（进而浓度）的方程式。如果由此可以评估大气浓度和毒性浓度之间的关系，则可以确定呼吸设备所需的“保护因子”。类似地，如果已知材料的近似蒸气压/温度关系，则可以估算闪点。

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