Smarter Options for Chemical Analysis
Immediate chemical analysis is the separation of pure substances from a mixture; Elemental analysis consists of separating and dosing the elements of a chemical combination. We will not talk here about this last one. The qualitative analysis determines the nature of the chemical elements present in a compound, and the purpose of quantitative analysis is to assay one or more of its constituents. For example, determining whether a salt sample contains the iodine element is a qualitative analysis; to measure the mass percentage of the iodine present in the sample is a quantitative analysis. You can learn more as you read the following.
Quantitative analysis
The results are given as a mass percentage for a solid, in molar concentration for a liquid. The determination of value requires several measures. Statistically, a sufficient number of measurements must be taken to get as close as possible to the exact value. The analysis technique also determines the number of measurements to be performed. It is, therefore, important to calculate the mean and precision of the measurements that represent the uncertainty of the measured value. The limit sensitivity of a device is the minimum value that can be measured with this device. Many measuring instruments are automated and in some cases, coupled to one or more computers, allowing a large number of measurements to …
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