Spectrophotometer: meaning, definitions and examples
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spectrophotometer
[ ˌspɛktrəfoʊˈtɒmətər ]
scientific instrument
A spectrophotometer is an instrument used to measure the intensity of light at different wavelengths, allowing for the analysis of the properties of materials. It is commonly used in chemistry and biology to determine concentrations of substances in a solution. By quantifying how much light is absorbed or transmitted, users can derive important information about the sample being examined.
Synonyms
light meter, optical analyzer, spectrometer.
Examples of usage
- The lab used a spectrophotometer to analyze the sample concentration.
- Researchers utilized a spectrophotometer to study light absorption in various solutions.
- The quality control department relied on the spectrophotometer for accurate readings.
- Using a spectrophotometer, scientists could identify specific compounds in the mixture.
Etymology
The word 'spectrophotometer' is derived from three parts: 'spectrum,' 'photo,' and 'meter.' The term 'spectrum' originates from the Latin word 'spectrum,' meaning 'appearance' or 'image,' and is related to the visible spectrum of light. 'Photo' comes from the Greek word 'phōs,' which means 'light.' Lastly, 'meter' is derived from the French word 'mètre' and the Greek word 'metron,' meaning 'measure.' The combination of these terms reflects the instrument's function: to measure light across the spectrum. Spectrophotometry as a technique began to develop in the 19th century, evolving with advancements in optics and photonic technologies, leading to its widespread use in laboratories by the mid-20th century.