proximate analysis

简明释义

近似分析

英英释义

例句

1.A detailed proximate analysis was performed on the food samples to ensure they meet safety standards.

对食品样本进行了详细的近似分析以确保它们符合安全标准。

2.Before using the feed in livestock, farmers often require a proximate analysis to check its nutritional value.

在使用饲料喂养牲畜之前，农民通常需要进行近似分析以检查其营养价值。

3.The laboratory conducted a proximate analysis to determine the moisture content of the sample.

实验室进行了近似分析以确定样品的水分含量。

4.The proximate analysis of coal helps in assessing its combustibility and energy output.

煤炭的近似分析有助于评估其可燃性和能量输出。

5.In environmental studies, proximate analysis is crucial for understanding soil composition.

在环境研究中，近似分析对于理解土壤成分至关重要。

作文

In the field of chemistry and materials science, understanding the composition of substances is crucial. One method that scientists and researchers frequently utilize to determine the composition of organic materials is called proximate analysis. This analytical technique provides a fundamental breakdown of a material’s components, which can include moisture, ash, volatile matter, and fixed carbon. The significance of proximate analysis lies in its ability to offer a quick assessment of the material's properties, which is essential for various applications, including energy production, environmental studies, and quality control in manufacturing processes.The process of proximate analysis typically involves several steps. First, the sample is dried to remove moisture content. This step is critical because excess moisture can skew the results, leading to inaccurate assessments of the material's energy potential or other characteristics. Once dried, the sample is subjected to combustion to determine the amount of ash produced. The ash represents the inorganic residue left after the organic material has been burned away.Next, the volatile matter is measured. This component includes gases and vapors released during the heating of the material, excluding the moisture already accounted for. The determination of volatile matter is particularly important in fields such as coal analysis, where it can indicate the combustibility and efficiency of the fuel. Finally, the fixed carbon content is evaluated, which represents the solid carbon remaining after the volatile substances have been expelled. Together, these components provide a comprehensive overview of the sample's composition.One of the primary advantages of proximate analysis is its speed and simplicity. Unlike more complex methods such as ultimate analysis, which measures elemental composition (carbon, hydrogen, nitrogen, sulfur, and oxygen), proximate analysis can be performed quickly, allowing for rapid decision-making in industrial settings. For instance, power plants may use this analysis to assess the quality of coal before combustion, ensuring that they maximize energy output while minimizing emissions.Moreover, proximate analysis plays a vital role in environmental monitoring. By analyzing organic waste materials, researchers can determine their potential for energy recovery through processes like anaerobic digestion or incineration. This not only aids in waste management but also contributes to sustainable energy practices by identifying valuable resources within waste streams.However, while proximate analysis offers valuable insights, it is essential to recognize its limitations. The method does not provide information on the chemical structure of the materials, nor does it quantify specific elements. Therefore, it is often used in conjunction with other analytical techniques to obtain a more comprehensive understanding of a material's properties.In conclusion, proximate analysis is a fundamental tool in the analysis of organic materials, providing essential information about their composition and properties. Its speed and efficiency make it an invaluable method in various fields, from energy production to environmental science. As technology advances and the need for sustainable practices grows, the importance of proximate analysis will likely continue to increase, helping researchers and industries make informed decisions based on the material characteristics they analyze.

在化学和材料科学领域，理解物质的组成至关重要。科学家和研究人员经常使用的一种方法是称为近似分析。这种分析技术提供了对材料成分的基本分解，包括水分、灰分、挥发性物质和固定碳。近似分析的重要性在于它能够快速评估材料的特性，这对于能源生产、环境研究和制造过程中的质量控制等各种应用至关重要。近似分析的过程通常包括几个步骤。首先，对样品进行干燥以去除水分。这一步至关重要，因为过多的水分会扭曲结果，导致对材料能量潜力或其他特性的不准确评估。一旦干燥，样品就会被燃烧以确定产生的灰分量。灰分代表有机材料燃烧后留下的无机残留物。接下来，测量挥发性物质。这个成分包括在加热材料过程中释放出的气体和蒸汽，不包括已经计算在内的水分。挥发性物质的确定在煤分析等领域尤为重要，因为它可以指示燃料的可燃性和效率。最后，评估固定碳含量，它代表在挥发性物质排出后剩余的固体碳。这些成分共同提供了样品组成的全面概述。近似分析的主要优点之一是其速度和简单性。与测量元素组成（碳、氢、氮、硫和氧）的更复杂的方法（如最终分析）相比，近似分析可以快速进行，从而允许在工业环境中快速决策。例如，发电厂可能会使用此分析来评估煤的质量，以确保最大限度地提高能量输出，同时减少排放。此外，近似分析在环境监测中发挥着至关重要的作用。通过分析有机废物材料，研究人员可以确定它们通过厌氧消化或焚烧等过程的能源回收潜力。这不仅有助于废物管理，还有助于可持续能源实践，通过识别废物流中的有价值资源。然而，尽管近似分析提供了宝贵的见解，但必须认识到其局限性。该方法不提供材料的化学结构信息，也不量化特定元素。因此，通常与其他分析技术结合使用，以获得对材料特性更全面的理解。总之，近似分析是分析有机材料的基本工具，提供有关其组成和特性的基本信息。其速度和效率使其成为各个领域（从能源生产到环境科学）的宝贵方法。随着技术的进步和对可持续实践需求的增长，近似分析的重要性可能会继续增加，帮助研究人员和行业根据他们分析的材料特性做出明智的决策。