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- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/15%3A_Developing_a_Standard_Method/15.2%3A_Verifying_the_MethodAfter developing and optimizing a method, the next step is to determine how well it works in the hands of a single analyst. Three steps make up this process: determining single-operator characteristic...After developing and optimizing a method, the next step is to determine how well it works in the hands of a single analyst. Three steps make up this process: determining single-operator characteristics, completing a blind analysis of standards, and determining the method’s ruggedness. If another standard method is available, then we can analyze the same sample using both methods and compare the results. If the result for any single test is unacceptable, then the method is not a suitable.
- https://chem.libretexts.org/Courses/Montana_State_University/MSU%3A_CHMY311_Fundamental_Analytical_Chemistry/11%3A_Quality_Assurance/11.03%3A_Quality_AssessmentThe written directives of a quality control program are a necessary, but not a sufficient condition for obtaining and maintaining a state of statistical control. Although quality control directives ex...The written directives of a quality control program are a necessary, but not a sufficient condition for obtaining and maintaining a state of statistical control. Although quality control directives explain how to conduct an analysis, they do not indicate whether the system is under statistical control. This is the role of quality assessment, the second component of a quality assurance program.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/05%3A_Standardizing_Analytical_Methods/5.02%3A_Calibrating_the_SignalThe accuracy in determining kA and Sreag relies on precise signal measurement, using calibrated equipment like balances and spectrophotometers. Calibrating involves adjusting the measured signal, Stot...The accuracy in determining kA and Sreag relies on precise signal measurement, using calibrated equipment like balances and spectrophotometers. Calibrating involves adjusting the measured signal, Stotal, to match a known standard signal, Sstd. For example, balances are calibrated using reference weights, while spectrophotometers are checked by measuring absorbance of specific solutions.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/15%3A_Quality_Assurance/15.03%3A_Quality_AssessmentThe text explains that quality control directives are crucial for analysis but not enough to ensure statistical control, which is managed by quality assessment???a key part of quality assurance. Quali...The text explains that quality control directives are crucial for analysis but not enough to ensure statistical control, which is managed by quality assessment???a key part of quality assurance. Quality assessment helps maintain, detect, and suggest solutions for loss of statistical control. It includes internal methods, like analyzing duplicate samples and spikes, and external methods, such as laboratory certification by an agency.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/05%3A_Standardizing_Analytical_Methods/5.05%3A_Compensating_for_the_Reagent_BlankThe page discusses the importance of selecting an appropriate reagent blank to correct signals in analytical methods. It explores different approaches to blank correction, including calibration and re...The page discusses the importance of selecting an appropriate reagent blank to correct signals in analytical methods. It explores different approaches to blank correction, including calibration and reagent blanks. The study highlights that different methods yield varying results, emphasizing the significance of a proper blank choice.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/15%3A_Quality_Assurance/15.07%3A_Chapter_Summary_and_Key_TermsThe page discusses the importance of quality assurance programs in analytical work to ensure high-quality results. It distinguishes between quality control, which involves bringing a system into stati...The page discusses the importance of quality assurance programs in analytical work to ensure high-quality results. It distinguishes between quality control, which involves bringing a system into statistical control through documentation and good practices, and quality assessment, which uses statistical tools to evaluate whether an analysis is under control and identify potential issues.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/16%3A_Quality_Assurance/16.3%3A_Quality_AssessmentThe written directives of a quality control program are a necessary, but not a sufficient, condition for obtaining and maintaining a state of statistical control. Although quality control directives e...The written directives of a quality control program are a necessary, but not a sufficient, condition for obtaining and maintaining a state of statistical control. Although quality control directives explain how we are to conduct an analysis, they do not indicate whether the system is under statistical control. This is the role of quality assessment, the second component of a quality assurance program.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_Volume_II_(Harvey)/06%3A_Quality_Assurance/6.03%3A_Quality_AssessmentThe written directives of a quality control program are a necessary, but not a sufficient condition for obtaining and maintaining a state of statistical control. Although quality control directives ex...The written directives of a quality control program are a necessary, but not a sufficient condition for obtaining and maintaining a state of statistical control. Although quality control directives explain how to conduct an analysis, they do not indicate whether the system is under statistical control. This is the role of quality assessment, the second component of a quality assurance program.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/05%3A_Standardizing_Analytical_Methods/5.09%3A_Chapter_Summary_and_Key_TermsThe page discusses quantitative analysis techniques for measuring a signal, Stotal, to calculate an analyte's amount using specific equations. It emphasizes eliminating errors by calibrating equipment...The page discusses quantitative analysis techniques for measuring a signal, Stotal, to calculate an analyte's amount using specific equations. It emphasizes eliminating errors by calibrating equipment and instruments, with manufacturers generally providing calibration standards and methods. Standardization strategies such as external standards, standard additions, and internal standards are highlighted.
