kjeldahl flask

简明释义

基耶达烧瓶

英英释义

例句

1.The design of the kjeldahl flask allows for efficient distillation of ammonia.

该凯尔达尔烧瓶的设计允许高效蒸馏氨气。

2.After adding the sulfuric acid, we placed the sample in the kjeldahl flask and heated it gently.

在加入硫酸后，我们将样品放入凯尔达尔烧瓶中，并轻轻加热。

3.In the laboratory, we used a kjeldahl flask to measure the nitrogen content in the sample.

在实验室，我们使用一个凯尔达尔烧瓶来测量样品中的氮含量。

4.It is important to clean the kjeldahl flask thoroughly before starting the experiment.

在开始实验之前，彻底清洁凯尔达尔烧瓶是很重要的。

5.The kjeldahl flask is essential for conducting the Kjeldahl method of nitrogen analysis.

在进行凯尔达尔氮分析法时，凯尔达尔烧瓶是必不可少的。

作文

In the field of chemistry, various instruments and apparatus play a crucial role in conducting experiments and analyses. One such essential piece of equipment is the kjeldahl flask, which is primarily used for determining the nitrogen content in organic compounds. This method is named after the Danish chemist Johan Kjeldahl, who developed it in the late 19th century. Understanding the significance of the kjeldahl flask can enhance our appreciation for analytical chemistry and its applications in various industries.The kjeldahl flask is typically made of glass and features a round bottom, which allows for even heating during the digestion process. The design of the flask is not only functional but also important for safety and efficiency in laboratory settings. When performing a Kjeldahl analysis, the sample is first digested with concentrated sulfuric acid in the kjeldahl flask. This process breaks down the organic material and converts nitrogen into ammonium sulfate. After digestion, the solution is then neutralized and distilled to determine the amount of nitrogen present.One of the primary reasons the kjeldahl flask is widely used in laboratories is its effectiveness in measuring protein content in food products. Proteins are essential macromolecules that play vital roles in biological systems, and their nitrogen content is a key indicator of protein levels. By using the Kjeldahl method, food scientists can assess the quality and nutritional value of various food items, ensuring that they meet regulatory standards and consumer expectations.Moreover, the kjeldahl flask is not limited to food analysis; it is also used in agricultural research to evaluate soil and fertilizer nitrogen levels. Understanding the nitrogen content in soil helps farmers make informed decisions about fertilization, ultimately leading to better crop yields and sustainable farming practices. In this context, the kjeldahl flask becomes an indispensable tool for promoting agricultural productivity and environmental stewardship.In addition to its practical applications, the kjeldahl flask serves as a reminder of the importance of proper laboratory techniques and safety protocols. Handling concentrated acids and other chemicals requires a thorough understanding of risks and precautions. Laboratory personnel must wear appropriate personal protective equipment (PPE) and work in well-ventilated areas to minimize exposure to harmful substances. The use of the kjeldahl flask exemplifies the intersection of scientific innovation and safety in the pursuit of knowledge.In conclusion, the kjeldahl flask is a vital instrument in analytical chemistry, particularly in the determination of nitrogen content in various samples. Its applications extend beyond food analysis to include agricultural research, highlighting its significance in promoting health and sustainability. As we continue to explore the complexities of chemistry, the kjeldahl flask stands out as a testament to the ingenuity of scientists like Johan Kjeldahl, whose contributions have shaped modern analytical techniques. Understanding the functionality and importance of the kjeldahl flask enriches our knowledge of chemistry and its real-world implications, making it a fundamental concept for students and professionals alike.

在化学领域，各种仪器和设备在进行实验和分析中发挥着至关重要的作用。其中一种必不可少的设备是凯尔达尔烧瓶，主要用于测定有机化合物中的氮含量。这种方法以丹麦化学家约翰·凯尔达尔（Johan Kjeldahl）的名字命名，他在19世纪末开发了这一方法。理解凯尔达尔烧瓶的重要性可以增强我们对分析化学及其在各个行业应用的欣赏。凯尔达尔烧瓶通常由玻璃制成，具有圆形底部，这样在消化过程中可以均匀加热。烧瓶的设计不仅功能性强，而且在实验室环境中安全和效率方面也很重要。在进行凯尔达尔分析时，样品首先与浓硫酸在凯尔达尔烧瓶中消化。这个过程分解有机物质并将氮转化为硫酸铵。消化后，溶液被中和并蒸馏以确定氮的含量。凯尔达尔烧瓶广泛用于实验室的主要原因之一是其在测量食品中蛋白质含量方面的有效性。蛋白质是生物系统中发挥重要作用的大分子，其氮含量是蛋白质水平的关键指标。通过使用凯尔达尔法，食品科学家可以评估各种食品的质量和营养价值，确保它们符合监管标准和消费者期望。此外，凯尔达尔烧瓶不仅限于食品分析；它还用于农业研究，以评估土壤和肥料中的氮含量。了解土壤中的氮含量可以帮助农民做出明智的施肥决策，最终提高作物产量并实现可持续的农业实践。在这个背景下，凯尔达尔烧瓶成为促进农业生产力和环境管理的重要工具。除了其实际应用外，凯尔达尔烧瓶还提醒我们实验室技术和安全协议的重要性。处理浓酸和其他化学品需要充分了解风险和预防措施。实验室人员必须穿戴适当的个人防护装备（PPE），并在通风良好的区域工作，以减少接触有害物质的机会。凯尔达尔烧瓶的使用体现了科学创新与安全之间的交汇点，在追求知识的过程中。总之，凯尔达尔烧瓶是分析化学中一项重要的仪器，特别是在测定各种样品中的氮含量方面。它的应用不仅限于食品分析，还包括农业研究，突显了其在促进健康和可持续发展方面的重要性。随着我们继续探索化学的复杂性，凯尔达尔烧瓶作为约翰·凯尔达尔等科学家的智慧的象征，突显了他们对现代分析技术的贡献。理解凯尔达尔烧瓶的功能和重要性丰富了我们对化学及其现实世界影响的知识，使其成为学生和专业人员都应掌握的基本概念。