atomic absorption spectrometry

简明释义

1. 原子吸收光谱测定法; 2. 原子吸收光谱法;

英英释义

例句

1.Researchers employed atomic absorption spectrometry to measure the concentration of lead in soil.

研究人员采用原子吸收光谱法测量土壤中铅的浓度。

2.Using atomic absorption spectrometry, we can accurately determine the levels of essential minerals in supplements.

通过使用原子吸收光谱法，我们可以准确确定补充剂中必需矿物质的水平。

3.In environmental studies, atomic absorption spectrometry is essential for detecting pollutants.

在环境研究中，原子吸收光谱法对于检测污染物至关重要。

4.The laboratory uses atomic absorption spectrometry to analyze heavy metals in water samples.

实验室使用原子吸收光谱法分析水样中的重金属。

5.The food safety department relies on atomic absorption spectrometry to ensure products are free of toxic elements.

食品安全部门依赖原子吸收光谱法确保产品不含有毒元素。

作文

Atomic absorption spectrometry (AAS) is a powerful analytical technique used to determine the concentration of specific metal ions in various samples. This method relies on the principle that atoms absorb light at characteristic wavelengths. When a sample is atomized, it can absorb light emitted from a source, typically a hollow cathode lamp, which is specific to the element being analyzed. The amount of light absorbed is directly proportional to the concentration of the element in the sample. The process begins with sample preparation, which may involve dilution or digestion, depending on the nature of the sample. Once prepared, the sample is introduced into the atomizer, where it is converted into a gaseous state. The atomization can be achieved through various techniques such as flame or electrothermal methods. In flame atomization, the sample is mixed with a fuel and oxidant and then introduced into a flame, while electrothermal atomization uses an electrically heated graphite furnace to vaporize the sample. After atomization, the light from the hollow cathode lamp passes through the atomized sample. Each element absorbs light at specific wavelengths, and by measuring the intensity of light that passes through the sample, we can determine how much light was absorbed and thus calculate the concentration of the element. The results are usually presented as a calibration curve, which is created using standards of known concentrations. One of the advantages of atomic absorption spectrometry (原子吸收光谱法) is its high sensitivity and selectivity for metal ions, making it suitable for trace analysis. It can detect elements at very low concentrations, often in the parts per billion range. This capability makes AAS invaluable in various fields, including environmental monitoring, food safety, and clinical analysis. For instance, it can be used to measure heavy metals in water, ensuring compliance with safety regulations, or to analyze nutritional elements in food products. However, there are limitations to this technique. Atomic absorption spectrometry (原子吸收光谱法) is primarily limited to the analysis of metals and does not provide information on non-metallic elements. Moreover, the presence of interfering substances in the sample can affect the accuracy of the results. Therefore, careful sample preparation and method validation are crucial for obtaining reliable data. In conclusion, atomic absorption spectrometry (原子吸收光谱法) is a vital tool in analytical chemistry that allows for the precise quantification of metal ions in various samples. Its ability to detect low concentrations of elements makes it essential for ensuring safety and compliance in numerous industries. As technology advances, improvements in AAS instrumentation and methodologies will likely enhance its capabilities, making it an even more indispensable technique in scientific research and industry.

原子吸收光谱法是一种强大的分析技术，用于测定各种样品中特定金属离子的浓度。该方法依赖于原子在特征波长下吸收光的原理。当样品被原子化时，它可以吸收来自光源（通常是空心阴极灯）的光，这种光是特定于被分析元素的。吸收的光量与样品中元素的浓度成正比。该过程始于样品准备，根据样品的性质，可能需要稀释或消化。准备好后，将样品引入原子化器，在那里将其转化为气态。原子化可以通过多种技术实现，如火焰法或电热法。在火焰原子化中，样品与燃料和氧化剂混合，然后引入火焰，而电热原子化则使用电加热石墨炉来蒸发样品。在原子化之后，来自空心阴极灯的光通过原子化样品。每种元素在特定波长下吸收光，通过测量穿过样品的光的强度，我们可以确定吸收了多少光，从而计算出元素的浓度。结果通常以标准曲线的形式呈现，标准曲线是使用已知浓度的标准制成的。原子吸收光谱法的一个优点是其对金属离子的高灵敏度和选择性，使其适用于痕量分析。它可以在非常低的浓度下检测元素，通常在十亿分之一的范围内。这种能力使得AAS在环境监测、食品安全和临床分析等多个领域中不可或缺。例如，它可以用于测量水中的重金属，以确保符合安全规定，或分析食品产品中的营养元素。然而，该技术也有其局限性。原子吸收光谱法主要限于金属的分析，并不提供关于非金属元素的信息。此外，样品中干扰物质的存在可能会影响结果的准确性。因此，仔细的样品准备和方法验证对于获得可靠的数据至关重要。总之，原子吸收光谱法是分析化学中的一个重要工具，可以精确量化各种样品中的金属离子。其检测低浓度元素的能力使其在众多行业中确保安全和合规性方面至关重要。随着技术的进步，AAS仪器和方法的改进可能会增强其能力，使其在科学研究和工业中变得更加不可或缺。