对乳牛排出的挥发性有机化合物的不同采样技术的适用性进行比较
Julia Eichinger1, Lucie K Tintrop2, Raphael Siegenthaler3
1Ruminant Nutrition and Emissions, Agroscope, Posieux, Switzerland.
Journal of breath research
|October 6, 2025
概括
这项研究比较了乳牛的气息采集设备的挥发性有机化合物 (VOCs). 透气口罩 (MaskV) 显示为最有希望的准确的VOC采样与最小的携带.
科学领域:
- 动物科学动物科学
- 环境科学 环境科学
- 分析化学 分析化学
背景情况:
- 没有标准化方法从奶牛中取样排气的挥发性有机化合物 (VOC).
- 准确的VOC采样对于了解奶牛健康和环境影响至关重要.
- 现有的呼吸采集装置需要对效率和可靠性进行评估.
研究的目的:
- 为了比较五种变体的三个气息采集设备,以抽取乳牛呼出的VOCs的样本.
- 通过使用不同的采集方法,评估样本之间潜在的VOC转移.
- 为了确定最适合用于准确可靠的VOC分析在牛的呼吸最合适的设备.
主要方法:
- 测试了五种呼吸采集变体:一个紧紧的口罩 (MaskN),一个过的口罩 (MaskF),一个通风的口罩 (MaskV),一个未过的GreenFeed系统 (GreenFeedU) 和一个过的GreenFeed系统 (GreenFeedF).
- 进行了两项实验:一项是评估VOC转移,另一项是评估其适用于抽出VOC的样本.
- 采集的空气样本在固相提取 (SPE) 弹上捕获后使用气色谱-质谱法 (GC-MS) 进行分析.
主要成果:
- 发现有挥发性有机化合物沉积和转移的证据,特别是在GreenFeedU系统 (16.3%) 中.
- 在呼出的呼吸样本中检测到总共1217±197个VOC峰值.
- 透气面罩 (MaskV) 检测到最多的各种VOC (甲基化物,类,酒精,类,类) 并显示出最低的携带量,而GreenFeedU捕获了最多的类.
结论:
- 大多数经过测试的变种,除了由于动物接受度不佳而导致的MaskF外,都适用于呼气中的VOC采样.
- 透气口罩 (MaskV) 由于其高VOC检测率和最小的携带量而成为最有前途的设备.
- 为了在乳牛中进行可靠的VOC分析,需要进一步标准化呼吸采样技术.
更多相关视频
09:19Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction
Published on: June 1, 2022
4.5K
11:02The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
Published on: September 7, 2015
22.9K
相关概念视频
01:18Sampling Methods: Sample Types
2.3K
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
2.3K
01:10Volatilization
4.9K
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
4.9K