gravimetric

简明释义

英[ˌɡrævɪˈmetrɪk]美[ˌɡrævəˈmetrɪk]

adj. （测定）重量的；重量分析的

英英释义

单词用法

同义词

反义词

例句

1.All JCSS gases are assigned their values using gravimetric standard gases analyzed by the government agency.

其数值均按相应质量比混合法调制，使用经过检定机构检定的标准气体。

2.The sintering procedure is confirmed by differential thermal analysis and thermal gravimetric analysis(TG-DTA).

烧结制度是经过差热-热重分析（TG-DTA）来确定的。

3.Based on the slaking curve and thermo-gravimetric curve of calcium lime, the rational cold compression molding techniques of calcium carbide were given.

通过分析生石灰的消化曲线和热失重曲线，提出了合理的电石成型工艺。

4.Do the topographical relief and the precision of the location of stations affect the result of gravimetric rneasurement?

地形的起伏以及测点位置的准确性是否会影响重力测量的结果？

5.Takachiho gravimetically produces standard gases for applications requiring the most demanding precision using the ultra-precise giant gravimetric balance.

我社对应更高精度的标准气体需求，可提供应用大质量超精密天平取得的质量比混合法标准气体。

6.The content of in volatile impurities in acetamidine hydrochloride was determined by gravimetric analysis.

采用重量分析法测定盐酸乙脒中难挥发杂质的含量。

7.The gravimetric hydrogen production rate exceeds that of other solar-driven thermochemical processes by more than an order of magnitude.

而分解出氢的效率以重量计算可比其它太阳能热制程的效率高出一个数量级。

8.The laboratory used gravimetric 重力测量的 analysis to determine the concentration of the substance in the solution.

实验室使用重力测量的分析来确定溶液中物质的浓度。

9.In environmental studies, gravimetric 重力测量的 methods are often employed to assess soil contamination levels.

在环境研究中，通常采用重力测量的方法来评估土壤污染水平。

10.The gravimetric 重力测量的 technique is essential for accurate weighing of samples in chemistry experiments.

在化学实验中，重力测量的技术对于样品的准确称量至关重要。

11.Researchers prefer gravimetric 重力测量的 measurements for their precision in quantifying material properties.

研究人员更喜欢重力测量的测量，因为它们在量化材料特性方面具有精确性。

12.The gravimetric 重力测量的 approach allows scientists to separate compounds based on their mass.

这种重力测量的方法使科学家能够根据化合物的质量进行分离。

作文

In the field of analytical chemistry, various methods are employed to determine the composition of substances. One such method is known as gravimetric analysis. This technique relies on the measurement of mass to ascertain the quantity of a specific compound or element in a sample. The fundamental principle behind gravimetric analysis is that the amount of a substance can be accurately determined by weighing it after it has been converted into a stable and pure form. The process typically begins with the preparation of the sample, which may involve dissolving it in a solvent or treating it with reagents to precipitate the desired component. For instance, if we want to determine the amount of chloride ions in a solution, we might add silver nitrate, which reacts with the chloride to form a solid precipitate of silver chloride. Once the precipitate forms, it is collected by filtration, washed to remove impurities, and then dried to a constant weight. After drying, the mass of the precipitate is measured. This weight can then be used to calculate the concentration of the original substance in the sample based on stoichiometric relationships. The advantage of using gravimetric methods lies in their high accuracy and precision, making them a reliable choice for quantitative analysis. However, gravimetric analysis also has its limitations. It requires careful handling and manipulation of samples, as any loss of material during the process can lead to significant errors in the final results. Moreover, the technique is time-consuming compared to other methods such as spectrophotometry or chromatography, which can yield results more rapidly. Despite these challenges, gravimetric analysis remains a cornerstone of quantitative chemistry. Its applications extend beyond simple laboratory analyses; it is also used in various industries, including pharmaceuticals, food production, and environmental monitoring. For example, in the pharmaceutical industry, gravimetric methods can be employed to ensure the correct dosage of active ingredients in medications, thereby ensuring efficacy and safety for consumers. In environmental science, gravimetric analysis can help measure pollutants in water and soil samples, aiding in the assessment of ecological health and compliance with regulatory standards. By determining the concentration of harmful substances, scientists can develop strategies for remediation and pollution control. Furthermore, the principles of gravimetric analysis can be applied to various fields such as materials science, where researchers might need to quantify the composition of alloys or composites. In this context, understanding the precise amounts of different elements can inform the development of new materials with desired properties. In conclusion, gravimetric analysis is a vital tool in the arsenal of analytical chemistry. While it may not be the fastest method available, its accuracy and reliability make it indispensable for many applications. As technology advances, integrating gravimetric techniques with modern instrumentation may enhance their efficiency and broaden their applicability, ensuring that this traditional method continues to play a crucial role in scientific research and industry.

在分析化学领域，采用多种方法来确定物质的组成。其中一种方法被称为重力分析。该技术依赖于质量测量，以确定样品中特定化合物或元素的数量。重力分析的基本原理是，通过将物质转化为稳定且纯净的形式，可以准确地确定其数量。 该过程通常始于样品的准备，这可能涉及将其溶解在溶剂中或用试剂处理以沉淀所需的成分。例如，如果我们想要确定溶液中氯离子的量，我们可能会添加硝酸银，它与氯反应生成氯化银的固体沉淀。一旦沉淀形成，就通过过滤收集，洗涤以去除杂质，然后干燥至恒重。 干燥后，测量沉淀的质量。然后可以根据化学计量关系使用该重量计算样品中原始物质的浓度。使用重力方法的优点在于其高精度和准确性，使其成为定量分析的可靠选择。 然而，重力分析也有其局限性。它需要仔细处理和操作样品，因为在过程中任何材料的损失都可能导致最终结果出现重大误差。此外，与光谱法或色谱法等其他方法相比，该技术耗时较长，后者可以更快速地得出结果。 尽管面临这些挑战，重力分析仍然是定量化学的基石。其应用不仅限于简单的实验室分析；它还用于制药、食品生产和环境监测等各个行业。例如，在制药行业，重力分析方法可用于确保药物中活性成分的正确剂量，从而确保消费者的有效性和安全性。 在环境科学中，重力分析可以帮助测量水和土壤样本中的污染物，帮助评估生态健康和遵守监管标准。通过确定有害物质的浓度，科学家可以制定修复和污染控制策略。 此外，重力分析的原理可以应用于材料科学等各个领域，研究人员可能需要量化合金或复合材料的组成。在这种情况下，了解不同元素的确切数量可以为开发具有所需特性的材料提供信息。 总之，重力分析是分析化学工具箱中的重要工具。虽然它可能不是最快的方法，但其准确性和可靠性使其在许多应用中不可或缺。随着技术的进步，将重力分析技术与现代仪器结合，可能会提高其效率并扩大其适用性，确保这种传统方法继续在科学研究和工业中发挥关键作用。