What_is_Anal_Chem

What_is_Anal_Chem - Analytical Chemistry Chem 3332 Accuracy...

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Analytical Chemistry Chem 3332 Accuracy and Precision Accuracy - is the number correct? standard reference materials primary standards round robin analyses Precision - with what confidence is the number known? number of replicates standard deviation measured Types of error systematic errors - affect accuracy random errors - affect precision
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Standard Reference Materials National Institute of Standards and Technology (NIST) example: SRM 1646, Estuarine Sediment certified levels of elements and uncertainty multiple techniques used instructions for drying source and preparation homogeneity Elements in SRM 1646 Estuarine River Sediment Elements in SRM 1646 - continued Estuarine River Sediment
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Elements in SRM 1646 Estuarine River Sediment - Techniques Used Chromatographic peaks Calibration Curves
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Standard Addition known quantities of analyte added to unknown sample requires linear calibration curve appropriate if component of matrix
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What_is_Anal_Chem - Analytical Chemistry Chem 3332 Accuracy...

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