buret

简明释义

英[bjuːˈrɛt]美[bjʊˈrɛt]

n. [分化]滴定管；玻璃量管

n. （Buret）人名；（法）比雷；（英）巴里特

英英释义

单词用法

同义词

反义词

例句

1.Mean. Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location.

估计一下在秤量，使用滴定管和确定终定位置的不确定度。

2.Chemistry experiment is based on the elementary knowledge, especially checking the usage of suction pipet and buret.

化学实验重在基础，特别是考察移液管和滴定管的使用；

3.Of solution to drop from the buret. Use parafilm to secure the tip of the buret.

细小液滴。要用石膜保护滴定管的塑胶头。

4.Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location. Do error propagation from these values and compare with the observed precision.

估计一下在秤量，使用滴定管和确定终定位置的不确定度。用这些值计算误差传播而且跟所观测值比较一下。

5.The basic buret is usually operated bY thumb and forefinger.

操作碱式滴定管是用拇指和食指。

6.Use parafilm to secure the tip of the buret.

要用石腊膜保护滴定管的塑胶头。

7.Upper Paleolithic huts from Buret, Siberia. These structures date from about 10, 000 BCE.

旧石器时代晚期西伯利亚buret的棚屋，时间约为公元前10 000。

8.Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location. Do error propagation from these values and compare with the observed precision.

估计一下在秤量，使用滴定管和确定终定位置的不确定度。用这些值计算误差传播而且跟所观测值比较一下。

9.The buret was filled with hydrochloric acid for the acid-base reaction demonstration.

这个buret装满了盐酸，用于酸碱反应的演示。

10.In the chemistry lab, we used a buret to measure precise volumes of liquid for our titration experiment.

在化学实验室，我们使用buret来精确测量液体的体积，以进行滴定实验。

11.The instructor demonstrated how to properly read the meniscus level in the buret.

老师演示了如何正确读取buret中的弯月面液位。

12.After filling the buret, I adjusted the stopcock to ensure a steady flow of solution.

填充完buret后，我调整了阀门，以确保溶液的稳定流动。

13.Make sure to check for air bubbles in the buret before starting your experiment.

在开始实验之前，确保检查buret中是否有气泡。

作文

In the world of chemistry, precision and accuracy are paramount. One instrument that embodies these qualities is the buret, a vital tool in titration experiments. A buret (滴定管) is a long, graduated glass tube with a tap at one end, used to dispense precise volumes of liquid. Its design allows for careful measurement and control of the flow of liquids, making it essential for quantitative analysis in laboratories.The use of a buret can be traced back to the early days of chemistry when scientists sought reliable methods to measure and mix chemicals. Today, it remains a staple in educational institutions and research facilities alike. When performing a titration, a chemist typically fills the buret with a titrant solution, which is then slowly released into a reaction vessel containing the analyte. By monitoring the volume of titrant dispensed, the chemist can determine the concentration of the unknown solution through stoichiometric calculations.One of the key advantages of using a buret is its ability to allow for incremental additions of the titrant. This feature is crucial when approaching the endpoint of a titration, where the desired reaction is nearly complete. The tap mechanism enables the user to control the flow of liquid very precisely, ensuring that even small changes in volume can be easily managed. This level of control is particularly important in experiments where accuracy is critical, such as in determining the acidity or alkalinity of a solution.Moreover, the buret is designed to minimize errors that may occur during measurement. Its graduated markings provide clear visual cues for the amount of liquid dispensed, and because it is made of glass, it allows for easy cleaning and maintenance. Scientists appreciate the transparency of the glass, as it enables them to observe the color changes that often accompany chemical reactions. This is especially useful in acid-base titrations, where the endpoint is indicated by a distinct color change due to the addition of an indicator.In addition to its practical applications, the buret also serves as a teaching tool in chemistry education. Students learn the importance of precision and the scientific method through hands-on experience with this instrument. By mastering the use of a buret, students gain a deeper understanding of chemical reactions and the principles of volumetric analysis. They become familiar with concepts such as molarity, normality, and equivalence points, all of which are fundamental to the study of chemistry.Despite the advancements in technology and the introduction of automated titration systems, the traditional buret remains a preferred choice for many chemists. Its simplicity and effectiveness make it an indispensable part of laboratory work. Whether in a high school classroom or a professional research lab, the buret continues to play a crucial role in the field of chemistry.In conclusion, the buret is more than just a piece of glassware; it is a symbol of precision, accuracy, and the pursuit of knowledge in the realm of chemistry. As students and scientists alike utilize this remarkable tool, they contribute to the ongoing exploration and understanding of the chemical world around us. The legacy of the buret will undoubtedly endure, inspiring future generations of chemists to appreciate the art and science of measurement.

在化学世界中，精确性和准确性至关重要。一个体现这些品质的仪器是buret，它是滴定实验中不可或缺的工具。buret（滴定管）是一个长而刻度分明的玻璃管，底端有一个水龙头，用于分配精确体积的液体。它的设计允许对液体流动的仔细测量和控制，使其成为实验室定量分析的必备工具。使用buret可以追溯到化学早期，当时科学家寻求可靠的方法来测量和混合化学物质。今天，它仍然是教育机构和研究机构的一个重要组成部分。在进行滴定时，化学家通常将滴定剂溶液装入buret中，然后缓慢释放到含有分析物的反应容器中。通过监测滴定剂的体积，化学家可以通过化学计量计算确定未知溶液的浓度。使用buret的一个关键优点是它能够允许逐步添加滴定剂。这一特性在接近滴定终点时尤为重要，此时所需的反应几乎完成。水龙头机制使用户能够非常精确地控制液体的流动，确保即使是体积的微小变化也能轻松管理。这种控制水平在准确性至关重要的实验中尤其重要，例如在确定溶液的酸度或碱度时。此外，buret的设计也旨在最小化测量过程中可能出现的错误。它的刻度标记为分配的液体量提供了明确的视觉提示，并且由于它是由玻璃制成的，因此易于清洁和维护。科学家们欣赏玻璃的透明性，因为它使他们能够观察伴随化学反应的颜色变化。这在酸碱滴定中尤为有用，在这种情况下，终点通过加入指示剂而表现出明显的颜色变化。除了实际应用外，buret在化学教育中也作为教学工具。学生通过与这一仪器的实践经验学习精确性的重要性和科学方法。通过掌握buret的使用，学生们对化学反应和体积分析的原理有了更深入的理解。他们熟悉摩尔浓度、当量浓度和当量点等概念，这些都是化学研究的基础。尽管技术进步和自动滴定系统的引入，传统的buret仍然是许多化学家的首选。它的简单性和有效性使其成为实验室工作的不可或缺的一部分。无论是在高中课堂还是专业研究实验室，buret继续在化学领域发挥重要作用。总之，buret不仅仅是一件玻璃器具；它象征着化学领域中精确、准确和对知识追求的精神。当学生和科学家利用这一卓越工具时，他们为探索和理解周围的化学世界做出了贡献。buret的遗产无疑将持续下去，激励未来的化学家欣赏测量的艺术与科学。