atomic absorption spectrophotometry

简明释义

原子吸收分光光度法

英英释义

例句

1.The laboratory uses atomic absorption spectrophotometry 原子吸收光谱法 to analyze metal concentrations in water samples.

实验室使用原子吸收光谱法来分析水样中的金属浓度。

2.Students in chemistry labs learn how to use atomic absorption spectrophotometry 原子吸收光谱法 to measure trace elements.

化学实验室的学生学习如何使用原子吸收光谱法来测量微量元素。

3.Researchers employed atomic absorption spectrophotometry 原子吸收光谱法 to determine the levels of lead in soil.

研究人员采用原子吸收光谱法来确定土壤中铅的含量。

4.Quality control in the manufacturing process often relies on atomic absorption spectrophotometry 原子吸收光谱法 for detecting impurities.

制造过程中的质量控制通常依赖于原子吸收光谱法来检测杂质。

5.In environmental studies, atomic absorption spectrophotometry 原子吸收光谱法 is crucial for assessing pollutant levels.

在环境研究中，原子吸收光谱法对于评估污染物水平至关重要。

作文

In the field of analytical chemistry, various techniques are employed to determine the concentration of elements in a sample. One such technique is atomic absorption spectrophotometry, which is widely used for its accuracy and sensitivity. 原子吸收光谱法 is a powerful method that allows scientists to measure the absorption of light by free atoms in the gaseous state. This technique is particularly useful for analyzing metals and metalloids in different matrices, including environmental samples, biological fluids, and industrial materials.The principle behind atomic absorption spectrophotometry is relatively straightforward. A sample is first atomized, typically using a flame or a graphite furnace. The atomization process converts the sample into free atoms, which then absorb specific wavelengths of light emitted by a lamp that corresponds to the element being analyzed. The amount of light absorbed by the atoms is directly proportional to the concentration of the element in the sample. This relationship is described by Beer-Lambert's law, which forms the foundation of quantitative analysis in this technique.One of the significant advantages of atomic absorption spectrophotometry is its ability to detect trace amounts of elements, often in the parts per million (ppm) range. This sensitivity makes it an invaluable tool in various fields, such as environmental monitoring, where detecting pollutants at low concentrations is crucial. For instance, measuring lead levels in drinking water or soil samples can help assess environmental contamination and protect public health.Moreover, atomic absorption spectrophotometry is favored for its simplicity and cost-effectiveness compared to other sophisticated techniques like inductively coupled plasma mass spectrometry (ICP-MS). While ICP-MS provides higher throughput and multi-element capabilities, atomic absorption spectrophotometry remains a go-to method for many laboratories due to its ease of use and lower operational costs.However, it is essential to note the limitations of atomic absorption spectrophotometry. The technique primarily focuses on single-element analysis, which means that if a sample contains multiple elements, each must be analyzed separately. Additionally, the presence of interfering substances can affect the accuracy of the results, necessitating careful sample preparation and method optimization.In conclusion, atomic absorption spectrophotometry is a vital analytical technique in chemistry that allows for the precise measurement of element concentrations in various samples. Its sensitivity, simplicity, and cost-effectiveness make it a preferred choice for many applications. As technology advances, the integration of atomic absorption spectrophotometry with other analytical methods may further enhance its capabilities, providing even more robust solutions for scientific research and industrial applications.

在分析化学领域，采用多种技术来确定样品中元素的浓度。其中一种技术是原子吸收光谱法，因其准确性和灵敏性而广泛使用。原子吸收光谱法是一种强大的方法，允许科学家测量自由原子在气态状态下对光的吸收。这项技术对于分析不同基质中的金属和类金属尤其有用，包括环境样品、生物体液和工业材料。原子吸收光谱法的原理相对简单。样品首先被雾化，通常使用火焰或石墨炉。雾化过程将样品转化为自由原子，然后这些原子吸收与所分析元素对应的灯发出的特定波长的光。原子吸收的光量与样品中元素的浓度成正比。这种关系由比尔-朗伯定律描述，构成了该技术定量分析的基础。原子吸收光谱法的一个重要优点是能够检测微量元素，通常在百万分之一（ppm）范围内。这种灵敏度使其成为各个领域的宝贵工具，例如环境监测，在低浓度下检测污染物至关重要。例如，测量饮用水或土壤样品中的铅含量可以帮助评估环境污染并保护公众健康。此外，原子吸收光谱法因其相较于其他复杂技术如电感耦合等离子体质谱（ICP-MS）的简单性和成本效益而受到青睐。虽然ICP-MS提供更高的通量和多元素能力，但由于操作简单和成本较低，原子吸收光谱法仍然是许多实验室的首选方法。然而，需要注意的是，原子吸收光谱法也有其局限性。这项技术主要集中于单元素分析，这意味着如果样品中含有多个元素，则必须分别分析每个元素。此外，干扰物质的存在可能会影响结果的准确性，因此需要仔细的样品准备和方法优化。总之，原子吸收光谱法是化学中一种重要的分析技术，允许精确测量各种样品中元素的浓度。其灵敏性、简单性和成本效益使其在许多应用中成为首选。随着技术的进步，将原子吸收光谱法与其他分析方法结合，可能进一步增强其能力，为科学研究和工业应用提供更强大的解决方案。