part per trillion

简明释义

万亿分之一

英英释义

例句

1.The concentration of lead in the water was measured at 5 part per trillion (万亿分之一).

水中铅的浓度测量为5 万亿分之一。

2.The FDA allows a maximum residue limit of 10 part per trillion (万亿分之一) for certain pesticides in food.

FDA允许某些农药在食品中的最大残留限量为10 万亿分之一。

3.Scientists found that the air contained pollutants at levels as low as 1 part per trillion (万亿分之一).

科学家发现空气中的污染物浓度低至1 万亿分之一。

4.The detection limit for this chemical in our lab is 0.1 part per trillion (万亿分之一).

我们实验室对此化学物质的检测限是0.1 万亿分之一。

5.In the study, they reported a contamination level of 3 part per trillion (万亿分之一) in the soil.

在研究中，他们报告土壤的污染水平为3 万亿分之一。

作文

Understanding the concept of part per trillion is essential in various scientific fields, particularly in environmental science, chemistry, and health-related studies. The term part per trillion refers to a measurement used to describe extremely low concentrations of substances. It indicates that for every trillion units of a solution or mixture, one unit is the substance being measured. This measurement is crucial when dealing with contaminants or trace elements in the environment, as many harmful substances exist in such minuscule amounts that traditional measurement units fail to capture their significance.For instance, in environmental monitoring, scientists often measure pollutants in terms of part per trillion. This is particularly important when assessing the presence of toxic chemicals in water supplies or air quality. Contaminants like heavy metals or pesticides can have devastating effects on ecosystems and human health, even at levels that are difficult to detect. By using part per trillion as a measurement, researchers can identify risks that would otherwise be overlooked.Moreover, in the field of medicine, understanding part per trillion is vital for drug development and testing. Many pharmaceutical compounds need to be effective at very low doses. Researchers must ensure that these drugs are effective while also being safe for human consumption. This involves measuring the concentration of active ingredients in medications, often down to the part per trillion level. Such precision ensures that patients receive the correct dosage without harmful side effects.In addition to environmental and medical applications, part per trillion measurements are also significant in food safety. Regulatory agencies monitor food products for contaminants, including pesticides and heavy metals, at concentrations as low as part per trillion. This level of scrutiny helps protect consumers from potential health risks associated with foodborne toxins. For example, if a certain fruit contains a pesticide residue at a concentration of 5 part per trillion, it might still be deemed safe for consumption, but continuous monitoring is necessary to ensure that levels do not exceed safety thresholds.The importance of part per trillion extends beyond just measurement; it also highlights the advancements in analytical techniques. With the development of sophisticated technologies like mass spectrometry and gas chromatography, scientists can detect and quantify substances at incredibly low concentrations. These advancements have made it possible to provide more accurate assessments of environmental and health-related risks, ultimately leading to better regulatory practices and public safety measures.In conclusion, the concept of part per trillion plays a critical role in various scientific disciplines. Its application in environmental monitoring, medical research, and food safety underscores the importance of precise measurements in protecting public health and the environment. As we continue to develop new technologies and methods for analysis, the ability to measure concentrations at the part per trillion level will remain an invaluable tool in ensuring safety and compliance across a wide range of industries.

理解万亿分之一的概念在多个科学领域都是至关重要的，特别是在环境科学、化学和健康相关研究中。术语万亿分之一是用来描述物质极低浓度的测量单位。它表示在一万亿个溶液或混合物单位中，有一个单位是被测量的物质。当处理环境中的污染物或微量元素时，这种测量至关重要，因为许多有害物质以如此微小的量存在，以至于传统的测量单位无法捕捉到它们的重要性。例如，在环境监测中，科学家通常以万亿分之一的方式测量污染物。这在评估水源或空气质量中的有毒化学物质的存在时尤为重要。重金属或农药等污染物即使在难以检测的水平上也会对生态系统和人类健康造成毁灭性的影响。通过使用万亿分之一作为测量单位，研究人员可以识别出那些可能被忽视的风险。此外，在医学领域，理解万亿分之一对于药物开发和测试至关重要。许多药物化合物需要在非常低的剂量下有效。研究人员必须确保这些药物在对人类消费安全的同时也有效。这涉及到测量药物中活性成分的浓度，通常低至万亿分之一的水平。这种精确性确保患者获得正确的剂量而不会产生有害的副作用。除了环境和医学应用外，万亿分之一的测量在食品安全方面也具有重要意义。监管机构监测食品产品中的污染物，包括农药和重金属，浓度低至万亿分之一。这种程度的审查有助于保护消费者免受与食源性毒素相关的潜在健康风险。例如，如果某种水果的农药残留浓度为5万亿分之一，它可能仍被认为是安全的，但持续监测是必要的，以确保其水平不超过安全阈值。万亿分之一的重要性不仅在于测量；它还突显了分析技术的进步。随着质谱和气相色谱等先进技术的发展，科学家能够检测和量化极低浓度的物质。这些进步使提供更准确的环境和健康风险评估成为可能，最终导致更好的监管实践和公共安全措施。总之，万亿分之一的概念在多个科学学科中发挥着关键作用。它在环境监测、医学研究和食品安全中的应用凸显了精确测量在保护公共健康和环境中的重要性。随着我们继续开发新的分析技术和方法，能够以万亿分之一的水平进行测量的能力将始终是确保各个行业安全和合规的重要工具。