atomic absorption spectrometry

简明释义

原子吸收分光光度法

英英释义

例句

1.Researchers employed atomic absorption spectrometry to determine the concentration 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浓度。

2.In quality control, atomic absorption spectrometry is essential for checking the purity of pharmaceuticals.

在质量控制中，原子吸收光谱法对检查药品的纯度至关重要。

3.Using atomic absorption spectrometry, scientists can accurately measure trace metals in biological samples.

科学家可以使用原子吸收光谱法准确测量生物样本中的微量金属。

4.The environmental lab used atomic absorption spectrometry to analyze heavy metals in water samples.

环境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 inspector utilized atomic absorption spectrometry to test for toxic elements in fish.

食品安全检查员利用原子吸收光谱法检测鱼类中的有毒元素。

作文

The field of analytical chemistry plays a crucial role in the identification and quantification of chemical elements in various samples. One of the most widely used techniques in this domain is atomic absorption spectrometry, which allows scientists to measure the concentration of specific metals in solutions. This technique is based on the principle that atoms absorb light at characteristic wavelengths, providing a unique fingerprint for each element. By measuring the amount of light absorbed by a sample, researchers can determine the concentration of the metal present.Atomic absorption spectrometry (原子吸收光谱法) has gained popularity due to its sensitivity and precision. It can detect trace amounts of metals, making it invaluable in environmental monitoring, food safety testing, and clinical diagnostics. For instance, in environmental studies, atomic absorption spectrometry is employed to analyze water samples for contaminants such as lead, mercury, and arsenic. These heavy metals pose significant health risks, and their detection is essential for ensuring public safety.The process of atomic absorption spectrometry involves several key steps. First, the sample is prepared, often requiring dilution or digestion to ensure that the metals are in a suitable form for analysis. Next, the sample is introduced into a flame or a graphite furnace, where it is atomized. This means that the sample is converted into free atoms, which can then absorb light.Once the sample is atomized, a light beam from a hollow cathode lamp, which emits light at the wavelength specific to the target metal, passes through the atomized sample. As the atoms absorb the light, they transition to a higher energy state. The amount of light absorbed is measured by a detector, and this data is used to calculate the concentration of the metal in the sample based on a calibration curve.One of the significant advantages of atomic absorption spectrometry is its ability to analyze multiple elements simultaneously. Modern instruments can be equipped with different lamps and detectors, allowing for the rapid analysis of various metals in a single run. This capability is particularly beneficial in scenarios where time and accuracy are critical, such as in clinical laboratories where patient samples need to be analyzed quickly.Despite its advantages, atomic absorption spectrometry does have limitations. For example, it is primarily suited for the analysis of metals and cannot be used for non-metallic elements. Additionally, the presence of interferences, such as other elements in the sample that may absorb light at similar wavelengths, can affect the accuracy of the results. Therefore, careful sample preparation and method validation are essential to obtain reliable data.In conclusion, atomic absorption spectrometry (原子吸收光谱法) is a powerful analytical tool that has revolutionized the way we detect and quantify metals in various matrices. Its high sensitivity and precision make it an indispensable method in many fields, including environmental science, food safety, and clinical diagnostics. As technology advances, we can expect further improvements in the capabilities of atomic absorption spectrometry, leading to even more accurate and efficient analyses. Understanding this technique is essential for anyone involved in analytical chemistry, as it provides valuable insights into the elemental composition of samples and helps ensure safety and compliance in various industries.

分析化学领域在识别和量化各种样品中的化学元素方面发挥着至关重要的作用。其中最广泛使用的技术之一是原子吸收光谱法，它允许科学家测量溶液中特定金属的浓度。这种技术基于原子在特征波长下吸收光的原理，为每个元素提供了独特的指纹。通过测量样品吸收的光量，研究人员可以确定金属的浓度。原子吸收光谱法因其灵敏度和精确性而受到欢迎。它可以检测微量金属，这使其在环境监测、食品安全检测和临床诊断中具有不可或缺的价值。例如，在环境研究中，原子吸收光谱法用于分析水样中的污染物，如铅、汞和砷。这些重金属对健康构成重大风险，其检测对于确保公众安全至关重要。原子吸收光谱法的过程涉及几个关键步骤。首先，样品需要准备，通常需要稀释或消化，以确保金属处于适合分析的形式。接下来，将样品引入火焰或石墨炉中，在那里它被雾化。这意味着样品被转化为自由原子，可以吸收光。一旦样品被雾化，来自空心阴极灯的光束通过雾化样品，该灯发出特定于目标金属波长的光。当原子吸收光时，它们会跃迁到更高的能级。检测器测量吸收的光量，并根据校准曲线计算样品中金属的浓度。原子吸收光谱法的一个显著优势是能够同时分析多种元素。现代仪器可以配备不同的灯和检测器，从而允许在一次运行中快速分析多种金属。这种能力在时间和准确性至关重要的情况下尤为有利，例如在临床实验室中，患者样本需要快速分析。尽管有其优点，原子吸收光谱法也有局限性。例如，它主要适用于金属分析，不能用于非金属元素。此外，样品中其他元素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数据至关重要。总之，原子吸收光谱法（原子吸收光谱法）是一种强大的分析工具，革命性地改变了我们检测和量化各种基质中金属的方式。其高灵敏度和精确性使其成为许多领域（包括环境科学、食品安全和临床诊断）中不可或缺的方法。随着技术的进步，我们可以期待原子吸收光谱法在能力上的进一步改善，从而导致更准确和高效的分析。理解这一技术对于任何参与分析化学的人来说都是必不可少的，因为它提供了对样品元素组成的宝贵见解，并有助于确保各个行业的安全和合规。