The Threshold Limit Value (TLV) is the supposed limit a person can be exposed to a certain VOC without experiencing adverse effects (1). TLV is usually measured in ppm (parts per million) for gases or mg/m³ (milligrams per cubic meter) for subatomic particles, such as smoke (2).

2020年9月9日 · tlv是个单位。 通常指在指定条件下，有毒气体不发生有害作用在空气中的浓度限值。 即表示一天工作人员在含有害气体气体等工作环境下，连续工作八小时对健康没有根本影响的浓度极限，常用ppm（百万分数）和mg/m3两种单位表示。

Threshold Limit Values (TLVs ®) refer to airborne concentrations of chemical substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, over a working lifetime, without adverse health effects.

Exposure to benzene, toluene, ethylbenzene, xylene (BTEX) and other volatile organic compounds (VOCs) from routine maintenance operations can cause severe health issues. Air-sampling media provides a method for VOC analysis.

2004年10月1日 · The ACGIH TLV® specifies an 8-hour time weighted average for total diesel hydrocarbons (vapor and aerosol) of 100 mg/m3. This is equivalent to approximately 15 ppm diesel vapor.

揮發性有機化合物(VOCs, Volatile Organ ic Compounds)其特性為在室溫下容易揮發的有 機化合物。 常見的VOCs包括溶劑(solvents),油漆稀釋劑(paint thinner),指甲油清洗液(nail polish remover)以及油類產生的蒸氣諸如:汽油(gasoline)、柴油(diesel)、加熱油(heating oil)、煤油(kerosene)及航空 …

The two most commonly used methods for VOC statistical analysis are Flame Ionisation Detection and Photo Ionisation Detection. Both methods measure the number of chemicals in the air on the assumption that most organic vapors produce positively charged …

2020年11月7日 · The Threshold Limit Value for Chemical Substances (TLV®-CS) Committee is appointed by the Board of Directors of ACGIH ® to develop occupational exposure guidelines for chemical substances. The

2015年4月1日 · ACGIH provides threshold limit values (TLV) according to short-term exposure limit and time-weighted average standards. TLV are based on a time-weighted average (TLV–TWA), meaning that an employee's exposure cannot exceed the TWA during 8-hour workday within a 40-hour work week (Purvis et al., 2001).

2019年2月1日 · TLV，是个单位，在可燃气检测领域，我们用LEL来说明危险级别，而在有毒气体领域，则用LTV说明危险级别。 TLVabbr. 阈限值Threshold Limit Value的缩写。 一般指在指定条件下不发生有害作用的容许值。在气体检测行业，用TLV，特 指车间空气中有害物质的最高允许浓度 ...