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Titrimetric Methods: Types and Commonly Used Strategies01:08

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In chemistry, titrimetric methods are broadly classified into three types: volumetric, gravimetric, and coulometric. Volumetric titrations involve measuring the volume of a titrant of known concentration that is required to react completely with an analyte. In gravimetric titrations, the standard solution reacts with the analyte to form an insoluble precipitate, which is filtered, dried, and weighed. In coulometric titrations, current is applied to an electrochemical reaction until the reaction...
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EDTA: Indirect and Alkalimetric Titration01:23

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Unlike direct titration, back-titration, and displacement titration, indirect titration is an EDTA titration method for quantifying anions. In the indirect titration method, anions are precipitated as their insoluble salts with excess metal ions. The filtrate containing the excess metal ions is directly titrated with standard EDTA until the endpoint is achieved. Another approach involves extracting the metal ion and back-titrating with standard EDTA to obtain the endpoint. In this way, the...
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Potentiometric Titration: Overview01:31

Potentiometric Titration: Overview

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Potentiometric titration is a quantitative analytical technique that determines the concentration of an analyte by measuring the potential difference between the two electrodes in the solution. The endpoint of a potentiometric titration is the point at which there is a significant change in the potential difference. It occurs when the stoichiometric reaction between the analyte and the titrant is complete. The endpoint is usually determined graphically by plotting the measured potential...
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Titration in Nonaqueous Solvents01:16

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Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
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Controlled-Current Coulometry: Coulometric Titration01:18

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Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
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Precipitation Titration: Overview01:26

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Precipitation titration involves the reaction of a titrant and an analyte to generate an insoluble precipitate. While precipitation titration uses various precipitating agents, silver nitrate is the most common precipitating reagent; titrations involving Ag+ are called argentometric titrations. Usually, the endpoint in a precipitation titration can be detected by visual indicators.
A precipitation titration curve demonstrates the change in concentration of the titrant or analyte upon adding the...
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Hot Biological Catalysis: Isothermal Titration Calorimetry to Characterize Enzymatic Reactions
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在没有安全网的情况下进行定位.

Seung Eun Lee1, Michael Mathis, Milisa Manojlovich

  • 1Seung Eun Lee is an associate professor at Yonsei University College of Nursing, Seoul, Republic of Korea, and a visiting scholar at the University of Michigan School of Nursing, Ann Arbor. Michael Mathis is an associate professor of anesthesiology at the University of Michigan Medical School, Ann Arbor. Milisa Manojlovich is a professor at the University of Michigan School of Nursing, Ann Arbor. Contact author: Seung Eun Lee, leese@yuhs.ac. The authors have disclosed no potential conflicts of interest, financial or otherwise.

The American journal of nursing
|December 24, 2025
PubMed
概括
此摘要是机器生成的。

重症监护室 (ICU) 的护士需要基于证据的协议来管理血管活性药物. 这项研究为优化在重症监护机构中对这些强效药物的定位提供了关键指导.

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科学领域:

  • 关键护理医学 关键护理医学
  • 药理学 药理学是指药理学的学科.
  • 护理科学 护理科学

背景情况:

  • 血管活性药物对于重症监护室 (ICU) 的血液动力学管理至关重要.
  • 目前用于血管活性药物定位的做法缺乏标准化,基于证据的指导方针.
  • 不一致的定位策略可能导致患者的治疗结果低于最佳,并增加不良事件.

研究的目的:

  • 制定并提出基于证据的建议,用于ICU的血管活性药物定位.
  • 为ICU护士提供明确,可操作的指导,为管理需要血液动力学支持的重症患者提供指导.
  • 提高血管活性药物治疗的安全性和有效性.

主要方法:

  • 对有关血管活性药物的使用和定位的现有文献进行系统审查.
  • 达成共识的发展过程涉及重症监护专家和ICU护士.
  • 对常用的血管活性剂的药理动力学和药理动力学数据的分析.

主要成果:

  • 确定了启动和调整血管活性输注的关键参数.
  • 针对常见的血管活性药物 (例如,上腺素,多巴胺,多布胺) 提出了基于证据的特定定位算法.
  • 建议涉及目标血液动力学目标和监测策略.

结论:

  • 针对血管活性药物定位的标准化,基于证据的指导对于ICU护士至关重要.
  • 实施这些建议可以改善患者护理和临床决策.
  • 进一步的研究应该集中在这些定位协议的未来验证上.