12 Questions
What is the first step in processing a sample according to the text?
The preparation of a laboratory sample
Why is it recommended to dry solid samples just before starting an analysis?
Any loss or gain of water changes the chemical composition of solids
What alternative method is mentioned for determining the moisture content of a sample?
Determining the moisture content at the time of the analysis in a separate analytical procedure
In what scenario should the analyte be kept inside a second sealed container?
When the analyte is a gas dissolved in a liquid
What is the importance of sampling in analytical chemistry?
Sampling involves obtaining a small mass of a material whose composition accurately represents the bulk of the material being sampled. It is frequently the most difficult step in an analysis and the source of greatest error.
How can you define a material as heterogeneous?
A material is heterogeneous if its constituent parts can be distinguished visually or with the aid of a microscope.
What is an assay in the context of analytical chemistry?
An assay is the process of determining how much of a given sample is the material indicated by its name.
Why is the level of accuracy required an important consideration in selecting an analytical method?
The level of accuracy required influences the choice of method in analytical chemistry.
Why are extraordinary measures sometimes required in sample processing?
To preserve the integrity of the sample.
What are replicate samples and why are they important?
Portions of a material of approximately the same size carried through an analytical procedure at the same time and in the same way; they improve result quality and reliability.
What is usually done with quantitative measurements on replicates?
They are usually averaged and subjected to various statistical tests for establishing reliability of results.
Why is it ideal for the solvent to dissolve the entire sample rapidly and completely?
To ensure the entire sample, including the analyte, is dissolved efficiently.
Test your knowledge on processing samples in the medical technology field at Alexius College's Department of Medical Technology. Learn about the different ways to process samples, including laboratory sample preparation.
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