Fluorescence Detection in Liquid and Gas Chromatography

Froehlich, Peter; Wehry, Ε. L.

doi:10.1007/978-1-4684-1092-1_2

Cited by 7 publications

(3 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this technique, when a source of light is used to activate the electrons in molecules of a certain compound, the electrons of the specimen molecules absorb sufficient energy to move to a higher energy state after a period of time. Then, the electron tends to lose this gained energy and recombine when it moves back to the lower state of energy leading to an emission of energy in a state of a photon; the emitted photon energy reflects the properties of a specific specimen, which can be derived by special calculations. , …”

Section: Introductionmentioning

confidence: 99%

“…In type B, the glass prism was replaced by a Quartz one to improve the UV wavelength ranges used. The device development was continued until a famous DU-spectrophotometer was achieved to provide a wide range of UV beams by including a hydrogen lamp and an improved monochromator. , The scientists used a spectrophotometer to examine and identify a given substance based on its absorption spectrum. ,,− Several techniques were developed to serve the same purpose of analysis, ,− each technique uses a different macromolecular reaction to detect the sample.…”

Section: Introductionmentioning

confidence: 99%

“…Then, the electron tends to lose this gained energy and recombine when it moves back to the lower state of energy leading to an emission of energy in a state of a photon; the emitted photon energy reflects the properties of a specific specimen, which can be derived by special calculations. 8 , 9 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Contactless Optical Liquid Identifier

Obeidat,

Abu Mousa,

Mushaljy

2023

ACS Omega

View full text Add to dashboard Cite

This paper presents the development of a portable device that can be used for liquid identification using the concept of Beer–Lambert law. The final device can recognize up to 30 different materials in their liquid state and provides some other useful features that can enhance its operation. The user can set a group of 30 liquids according to specific needs and applications. The device can provide the user with some specific settings to start the measurements. The volume of a fluid is identified by a 4 mL sample inserted in the cuvette, then the user can start measuring the concentration of some common solvents like methanol, ethanol, etc. by passing a light of different wavelengths through the sample. The amount of the transferred light is measured using photodetectors and the readings depend on the amount of absorption. The amount of absorption depends on the sample types, colors, contents, and concentrations, so it is used as the main indicator to identify a specific sample.

show abstract

Section: Introductionmentioning

confidence: 99%