[cs_content][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Applying Chemical Ideas > Analysis of Inorganic Substances >
[/cs_text][cs_text]Colourimetry
- Technique in analytical and physical chemistry used to determine the concentration of coloured compounds in solution by measuring its absorbance of light of a specific wavelength and on the principles of Beer-Lambert Law.
- To measure the concentration, a device called colorimeter is used.
- Based on a two-step comparison process:
- An initial reading with only the sample being present in the colorimeter
- Sample reading after the reaction between sample and reagents
Ultraviolet – visible spectrophotometry
- Measurement of declination of a beam of light in the visible or adjacent region after it passes through a sample or after reflection from a sample surface.
- Commonly used technique in analytical chemistry for quantitative determination of transition metal ions, highly conjugated organic compounds and biological macromolecules.
- One of the best methods to detect impurities in organic substances.
Atomic absorption spectroscopy
- Technique of quantitative analysis where atoms in free state absorb optical radiation (light) and emits a measurable signal.
- It is quite a sensitive technique and can measure up to parts per billion of a gram in a sample.
- Widely used in soil testing, forensics, environmental studies, quality assurance in food industry etc.
[/cs_text][/cs_column][/cs_row][/cs_section][/cs_content]