Gravy train
Gravimetric analysis is a method in analytical chemistry for the quantitative determination of an analyte based on the mass of a solid. In gravimetric analysis, measurements of mass are used to determine the amount of the desired constituent in a sample.
History[edit | edit source]
The concept of gravimetric analysis has been in existence since the 18th century, with the earliest recorded use by a French chemist named Louis Nicolas Vauquelin. He used this method to discover the element chromium by analyzing the mineral crocoite.
Principle[edit | edit source]
The principle of gravimetric analysis is based on the measurement of the mass of the analyte or a compound related to the analyte. The analyte is converted into a stable and pure substance that can be isolated and weighed. The mass of the analyte can then be determined from the mass of this substance and its chemical composition.
Procedure[edit | edit source]
The procedure for gravimetric analysis involves several steps:
- Preparation of a solution containing a known amount of the analyte.
- Separation of the analyte from the rest of the sample.
- Conversion of the analyte into an insoluble form.
- Isolation of the analyte.
- Calculation of the amount of the analyte based on its mass and the mass of the sample.
Types of Gravimetric Analysis[edit | edit source]
There are two main types of gravimetric analysis: precipitation and volatilization. In precipitation gravimetry, the analyte is separated by precipitation. In volatilization gravimetry, the analyte or its reaction product is volatilized and the mass loss is measured.
Applications[edit | edit source]
Gravimetric analysis is used in various fields such as chemistry, pharmaceuticals, food analysis, and environmental analysis. It is used to determine the amount of a specific element or compound in a sample, to check the purity of a sample, or to determine the composition of a sample.
Advantages and Disadvantages[edit | edit source]
Gravimetric analysis has several advantages, including high precision and accuracy, simplicity, and low cost. However, it also has some disadvantages, such as the time-consuming nature of the procedure and the requirement for a large amount of sample.
See Also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD
