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- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/05%3A_Evaluating_Analytical_Data/5.04%3A_The_Distribution_of_Measurements_and_ResultsA population is the set of all objects in the system we are investigating. For our experiment, the population is all United States pennies in circulation. This population is so large that we cannot an...A population is the set of all objects in the system we are investigating. For our experiment, the population is all United States pennies in circulation. This population is so large that we cannot analyze every member of the population. Instead, we select and analyze a limited subset, or sample of the population.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/26%3A_Introduction_to_Chromatographic_SeparationsDespite the power of these instrumental methods of analysis, their use is often limited if the sample contains species that will interfere with the analysis. Chromatography provides a solution to the ...Despite the power of these instrumental methods of analysis, their use is often limited if the sample contains species that will interfere with the analysis. Chromatography provides a solution to the analysis of complex samples by providing a way to separate the individual species in a sample prior to their analysis by a spectroscopic or electroanalytical method of analysis.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/13%3A_Chromatographic/13.7%3A_ElectrophoresisElectrophoresis is a class of separation techniques in which we separate analytes by their ability to move through a conductive medium—usually an aqueous buffer—in response to an applied electric fiel...Electrophoresis is a class of separation techniques in which we separate analytes by their ability to move through a conductive medium—usually an aqueous buffer—in response to an applied electric field. In the absence of other effects, cations migrate toward the electric field’s negatively charged cathode.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/03%3A__The_Vocabulary_of_Analytical_Chemistry/3.10%3A_Chapter_Summary_and_Key_TermsThe chapter emphasizes the importance of mastering the vocabulary specific to analytical chemistry, differentiating terms such as analyte, matrix, technique, method, procedure, and protocol. It discus...The chapter emphasizes the importance of mastering the vocabulary specific to analytical chemistry, differentiating terms such as analyte, matrix, technique, method, procedure, and protocol. It discusses key criteria for selecting analytical methods, including accuracy, precision, sensitivity, and more, highlighting the need to balance these interdependent factors.
- https://chem.libretexts.org/Courses/Lakehead_University/Analytical_I/4%3A_Evaluating_Analytical_Data/4.04%3A_The_Distribution_of_Measurements_and_ResultsA population is the set of all objects in the system we are investigating. For our experiment, the population is all United States pennies in circulation. This population is so large that we cannot an...A population is the set of all objects in the system we are investigating. For our experiment, the population is all United States pennies in circulation. This population is so large that we cannot analyze every member of the population. Instead, we select and analyze a limited subset, or sample of the population.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/13%3A_Chromatographic/13.4%3A_Gas_ChromatographyIn gas chromatography (GC) we inject the sample, which may be a gas or a liquid, into an gaseous mobile phase (often called the carrier gas). The mobile phase carries the sample through a packed or ca...In gas chromatography (GC) we inject the sample, which may be a gas or a liquid, into an gaseous mobile phase (often called the carrier gas). The mobile phase carries the sample through a packed or capillary column that separates the sample’s components based on their ability to partition between the mobile phase and the stationary phase.
