gravimetric analysis

简明释义

重量分析

英英释义

例句

1.The students were excited to conduct gravimetric analysis as part of their chemistry lab experiments.

学生们很高兴能在化学实验中进行重量分析。

2.During the quality control process, gravimetric analysis was used to ensure the purity of the compound.

在质量控制过程中，使用重量分析来确保化合物的纯度。

3.We learned that gravimetric analysis involves measuring the mass of a substance to determine its concentration.

我们了解到，重量分析涉及测量物质的质量以确定其浓度。

4.The accuracy of gravimetric analysis is crucial for obtaining reliable results in chemical research.

在化学研究中，重量分析的准确性对获得可靠结果至关重要。

5.In the laboratory, we performed gravimetric analysis to determine the amount of chloride ions in the sample.

在实验室中，我们进行了重量分析以确定样品中氯离子的含量。

作文

Gravimetric analysis is a method used in analytical chemistry to determine the quantity of an analyte based on its mass. This technique is one of the oldest methods of quantitative analysis and remains relevant today due to its high accuracy and reliability. The fundamental principle behind gravimetric analysis (重量分析) is that the mass of a substance can be measured with great precision, allowing chemists to deduce the concentration of a particular component in a sample. In a typical gravimetric analysis (重量分析) procedure, a sample containing the analyte is first dissolved in a suitable solvent. The next step involves precipitating the analyte from the solution by adding a reagent that reacts specifically with it. This reaction forms a solid precipitate that can be separated from the liquid phase through filtration. Once the precipitate is collected, it is washed to remove impurities and then dried or ignited to achieve a constant mass. The final step is to weigh the dried precipitate accurately. The mass of the precipitate is then used to calculate the amount of the analyte present in the original sample. For instance, if the analyte is a metal ion, the mass of the precipitate formed can be related to the original concentration of that metal in the solution using stoichiometric relationships. This allows for precise quantification of the analyte, making gravimetric analysis (重量分析) a powerful tool in various fields such as environmental science, pharmaceuticals, and materials science.One of the key advantages of gravimetric analysis (重量分析) is its ability to provide very accurate results, often with a precision of up to 0.01%. This level of accuracy is particularly valuable when analyzing samples where the concentration of the analyte is low or when dealing with complex mixtures. Additionally, since the method relies on mass measurements rather than volume, it is less susceptible to errors caused by temperature and pressure variations, which can affect liquid volumes.However, gravimetric analysis (重量分析) also has its limitations. The process can be time-consuming, requiring careful handling and multiple steps to ensure accuracy. Furthermore, not all analytes can be easily precipitated or converted into a solid form, which may restrict the applicability of this method in certain situations. In cases where rapid analysis is required, other techniques such as spectrophotometry or chromatography may be more suitable.Despite these challenges, gravimetric analysis (重量分析) continues to be a widely used method in laboratories around the world. Its ability to provide accurate and reproducible results makes it an essential technique for chemists and researchers. As technology advances, newer methods may complement or enhance traditional gravimetric techniques, but the foundational principles of gravimetric analysis (重量分析) will likely remain integral to the field of analytical chemistry. In conclusion, gravimetric analysis (重量分析) is a critical method for determining the mass of an analyte in a sample, offering high precision and reliability. While it may not be the fastest method available, its accuracy ensures that it remains a cornerstone of quantitative analysis in various scientific disciplines.