atomic absorption unit

简明释义

原子吸收装瞒;

英英释义

例句

1.In environmental studies, an atomic absorption unit is essential for detecting pollutants.

在环境研究中，原子吸收单元对于检测污染物至关重要。

2.Researchers often rely on an atomic absorption unit for metal analysis in biological samples.

研究人员通常依赖于原子吸收单元对生物样品进行金属分析。

3.To ensure accurate results, the atomic absorption unit must be calibrated regularly.

为了确保结果准确，原子吸收单元必须定期校准。

4.The laboratory uses an atomic absorption unit to measure the concentration of metals in water samples.

实验室使用原子吸收单元来测量水样中金属的浓度。

5.The atomic absorption unit can analyze trace elements in soil samples effectively.

该原子吸收单元可以有效分析土壤样品中的微量元素。

作文

In the field of analytical chemistry, various instruments are employed to measure the concentration of elements in different samples. One such instrument that has gained prominence is the atomic absorption unit. This unit is fundamental for detecting and quantifying trace metals in a variety of matrices, including water, soil, and biological samples. The principle behind the atomic absorption unit is based on the absorption of light by free atoms in the gaseous state. When a sample is introduced into the flame or graphite furnace of the unit, it is vaporized, and the atoms of the element of interest are formed. The atomic absorption unit uses a light source that emits specific wavelengths corresponding to the element being analyzed. As the light passes through the vaporized sample, some of it is absorbed by the atoms, and this absorption is proportional to the concentration of the element. By measuring the intensity of the transmitted light, scientists can determine how much of the element is present in the sample. One of the advantages of using an atomic absorption unit is its sensitivity. It can detect elements at very low concentrations, often in parts per billion (ppb). This makes it an invaluable tool in environmental monitoring, where contaminants may be present in minuscule amounts. For instance, in water quality testing, the atomic absorption unit can identify heavy metals such as lead or mercury, which can pose significant health risks even at low levels. Moreover, the atomic absorption unit is relatively easy to use and provides rapid results, making it suitable for routine analysis in laboratories. However, it is essential to note that this technique has its limitations. For example, it cannot simultaneously analyze multiple elements; each element requires a separate measurement. Additionally, the presence of other substances in the sample can interfere with the absorption readings, leading to inaccuracies. Despite these challenges, advancements in technology have improved the capabilities of the atomic absorption unit. Modern units are equipped with advanced features such as automatic sample introduction systems and sophisticated software for data analysis, which enhance their accuracy and efficiency. Furthermore, the development of flame and furnace techniques allows for greater flexibility in analyzing different types of samples. In conclusion, the atomic absorption unit is a crucial instrument in analytical chemistry that plays a vital role in detecting and quantifying trace elements in various samples. Its high sensitivity and ease of use make it a preferred choice for many laboratories. As technology continues to evolve, we can expect further improvements in the performance and capabilities of the atomic absorption unit, solidifying its position as an essential tool in scientific research and environmental monitoring.

在分析化学领域，采用各种仪器来测量不同样品中元素的浓度。其中一项日益受到重视的仪器是原子吸收单元。该单元对于检测和定量多种基质（包括水、土壤和生物样本）中的微量金属至关重要。原子吸收单元的原理基于气态自由原子的光吸收。当样品被引入单元的火焰或石墨炉中时，它会被气化，并形成所分析元素的原子。原子吸收单元使用发出特定波长的光源，这些波长与正在分析的元素相对应。当光通过气化样品时，一部分光被原子吸收，这种吸收与元素的浓度成正比。通过测量透射光的强度，科学家可以确定样品中元素的含量。使用原子吸收单元的一个优点是其灵敏度。它可以在非常低的浓度下检测元素，通常达到十亿分之一（ppb）。这使其成为环境监测中不可或缺的工具，因为污染物可能以微小的数量存在。例如，在水质检测中，原子吸收单元可以识别铅或汞等重金属，即使在低水平下也可能对健康构成重大风险。此外，原子吸收单元相对易于使用，并能提供快速结果，使其适合实验室的常规分析。然而，需要注意的是，这种技术有其局限性。例如，它不能同时分析多个元素；每个元素都需要单独测量。此外，样品中其他物质的存在可能会干扰吸收读数，导致不准确。尽管面临这些挑战，技术的进步提高了原子吸收单元的能力。现代设备配备了先进的功能，如自动样品引入系统和复杂的数据分析软件，提高了其准确性和效率。此外，火焰和炉技术的发展使得分析不同类型样品的灵活性更大。总之，原子吸收单元是分析化学中一项关键仪器，在检测和定量各种样品中的微量元素方面发挥着重要作用。其高灵敏度和易用性使其成为许多实验室的首选。随着技术的不断发展，我们可以期待原子吸收单元性能和能力的进一步提升，巩固其在科学研究和环境监测中的重要工具地位。