自动称重系统与手动称重精度比较在不同湿度条件下的PM加载过器测量中
Dmytro Chyzhykov1, Kamila Widziewicz-Rzońca2, Monika Błaszczak1
1Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland.
Environmental monitoring and assessment
|October 31, 2023
概括
这项研究比较了在不同湿度下对颗粒物 (PM) 过器的手动和自动称重系统的测量. 这两种方法都在30-55%RH之间表现出很好的精度,其中30%RH为PM质量测量提供了稍微更好的设备稳定性.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 空气质量监测 空气质量监测
背景情况:
- 精确测量颗粒物质量 (PM) 对于空气质量评估和监管合规性至关重要.
- 在不同相对湿度 (RH) 下,颗粒过器吸收的水蒸气可以显著影响质量测量.
- 在直接比较手动与不同RH条件下的PM过器自动称重系统的精度方面存在一个知识差距.
研究的目的:
- 评估和比较手动和自动权重系统的精度,以平衡颗粒过器.
- 为了研究不同相对湿度水平对PM加载过器称重精度的影响.
- 评估当前监管标准对于过器调节湿度的适用性.
主要方法:
- 用手动和自动平衡衡量了三种类型的含有颗粒的过器.
- 在三种不同的相对湿度条件下,每个过器被称重两次 (30%,45-50%和55%RH).
- 在不同的RH水平和称重方法中分析了称重精度和设备稳定性.
主要成果:
- 手动和自动称重方法在30-55%的RH范围内表现出可比的精度,这表明它们在很大程度上可以互换.
- 与较高的湿度水平相比,在30%的RH下观察到设备稳定性和精度略有提高.
- 这些发现支持40 CFR第50部分,附录L中规定的湿度条件范围 (30-40% RH),而不是PN-EN 12341:2014标准 (45-50% RH).
结论:
- 相对湿度对颗粒物质量测量的精度有很大影响,因此在波器称重过程中需要仔细控制.
- 自动称重系统为PM波器分析提供了一种可行且精确的替代手动称重.
- 该研究建议用于过器调节的特定RH范围,以提高空气质量监测中的PM质量测量的准确性和可靠性.
更多相关视频
09:33Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
Published on: December 23, 2022
2.3K
06:39A High Performance Impedance-based Platform for Evaporation Rate Detection
Published on: October 17, 2016
6.6K
相关概念视频
Uncertainty in Measurement: Accuracy and Precision
73.8K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.
73.8K
Uncertainty in Measurement: Reading Instruments
38.3K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
38.3K
Filtration
833
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
833
Instrument Calibration
202
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
202
