atomic absorption spectrochemical analysis

简明释义

原子吸收光谱分析

英英释义

例句

1.By employing atomic absorption spectrochemical analysis, researchers can accurately assess the quality of soil for agricultural purposes.

通过采用原子吸收光谱化学分析，研究人员可以准确评估土壤的农业用途。

2.In forensic science, atomic absorption spectrochemical analysis is used to detect trace elements in biological samples.

在法医学中，原子吸收光谱化学分析用于检测生物样本中的微量元素。

3.The atomic absorption spectrochemical analysis method is essential for monitoring environmental pollution levels.

该原子吸收光谱化学分析方法对于监测环境污染水平至关重要。

4.The food industry relies on atomic absorption spectrochemical analysis to ensure products are free from harmful contaminants.

食品行业依赖于原子吸收光谱化学分析来确保产品不含有害污染物。

5.The laboratory utilized atomic absorption spectrochemical analysis to determine the concentration of heavy metals in water samples.

实验室利用原子吸收光谱化学分析来确定水样中重金属的浓度。

作文

Atomic absorption spectrochemical analysis, often abbreviated as AAS, is a powerful analytical technique used to determine the concentration of specific metals in various samples. This method is particularly valuable in fields such as environmental science, chemistry, and biochemistry, where understanding trace metal levels can be crucial for both research and regulatory purposes. The fundamental principle behind atomic absorption spectrochemical analysis (原子吸收光谱分析) is based on the absorption of light by free atoms in the gaseous state. When a sample containing metal ions is atomized, it produces free atoms that can absorb light at characteristic wavelengths specific to each element.The process begins with the preparation of the sample, which may involve digestion or dilution depending on the nature of the material being analyzed. Once prepared, the sample is introduced into a flame or graphite furnace, where it is vaporized to create a cloud of free atoms. A light source, typically a hollow cathode lamp that emits light at the wavelength corresponding to the target metal, is then directed through this atomized sample. As the light passes through the sample, some of it is absorbed by the free atoms, and the amount of light absorbed is measured by a detector.The intensity of the absorbed light is proportional to the concentration of the metal in the sample; thus, by comparing the absorption to a calibration curve created from standards of known concentrations, the concentration of the metal in the original sample can be determined. This quantitative aspect of atomic absorption spectrochemical analysis (原子吸收光谱分析) makes it an essential tool in various applications, including quality control in manufacturing processes, monitoring pollution in environmental studies, and assessing the nutritional content of food.One of the significant advantages of atomic absorption spectrochemical analysis (原子吸收光谱分析) is its sensitivity. It can detect metals at very low concentrations, often in the parts per million (ppm) or even parts per billion (ppb) range. This sensitivity is critical when analyzing samples that may contain toxic elements, such as lead or mercury, where even minute quantities can pose health risks. Additionally, the technique is relatively straightforward and can be automated, allowing for high-throughput analysis in laboratories.However, there are limitations to consider. The atomic absorption spectrochemical analysis (原子吸收光谱分析) technique is primarily limited to the analysis of metals and does not provide information on non-metal elements or compounds. Furthermore, the presence of interfering substances in complex matrices can affect the accuracy of the results. Therefore, proper sample preparation and method validation are essential to ensure reliable outcomes.In conclusion, atomic absorption spectrochemical analysis (原子吸收光谱分析) is a vital analytical technique that has widespread applications across various scientific disciplines. Its ability to accurately measure trace metal concentrations makes it indispensable in environmental monitoring, food safety, and industrial quality control. As technology advances, the efficiency and capabilities of AAS continue to improve, further solidifying its role as a cornerstone in analytical chemistry. Understanding this technique allows researchers and professionals to leverage its strengths and address its limitations, ensuring accurate and meaningful results in their analyses.

原子吸收光谱分析（通常缩写为AAS）是一种强大的分析技术，用于确定各种样品中特定金属的浓度。这种方法在环境科学、化学和生物化学等领域尤其有价值，因为了解微量金属水平对于研究和监管目的至关重要。atomic absorption spectrochemical analysis（原子吸收光谱分析）的基本原理是基于自由原子在气态时对光的吸收。当含有金属离子的样品被雾化时，它会产生可以在特定波长下吸收光的自由原子，这些波长是每种元素特有的。该过程始于样品的准备，可能涉及消化或稀释，具体取决于所分析材料的性质。一旦准备好，样品就会被引入火焰或石墨炉中，在那里它被气化以创建自由原子的云。一个光源，通常是发出与目标金属相应波长的光的空心阴极灯，然后被引导穿过这个雾化样品。当光通过样品时，一部分光被自由原子吸收，吸收的光量由探测器测量。吸收光的强度与样品中金属的浓度成正比；因此，通过将吸收与来自已知浓度标准的校准曲线进行比较，可以确定原始样品中金属的浓度。atomic absorption spectrochemical analysis（原子吸收光谱分析）的这种定量特性使其成为各种应用中的重要工具，包括制造过程中的质量控制、环境研究中的污染监测以及食品营养成分的评估。atomic absorption spectrochemical analysis（原子吸收光谱分析）的一大显著优点是其灵敏度。它可以在非常低的浓度下检测金属，通常在百万分之一（ppm）甚至十亿分之一（ppb）范围内。这种灵敏度在分析可能含有毒元素的样品时至关重要，例如铅或汞，其中即使微量也可能构成健康风险。此外，该技术相对简单且可以自动化，允许实验室进行高通量分析。然而，需要考虑一些限制。atomic absorption spectrochemical analysis（原子吸收光谱分析）技术主要限于金属的分析，并不提供有关非金属元素或化合物的信息。此外，复杂基质中干扰物质的存在可能会影响结果的准确性。因此，适当的样品准备和方法验证对于确保可靠的结果至关重要。总之，atomic absorption spectrochemical analysis（原子吸收光谱分析）是一种重要的分析技术，在各个科学学科中有广泛的应用。其准确测量微量金属浓度的能力使其在环境监测、食品安全和工业质量控制中不可或缺。随着技术的进步，AAS的效率和能力不断提高，进一步巩固了其作为分析化学基石的角色。理解这一技术使研究人员和专业人员能够利用其优势并解决其局限性，从而确保其分析中的准确和有意义的结果。