Determination of elemental composition of coffee using UV-pulsed laser induced breakdown spectroscopy

Journal Article · Fri Jun 10 04:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4953128· OSTI ID:22609050

Baig, Umair; Dastageer, M. A.; Sarwar, Mohsin ^[1]

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1. Laser Research Group, Physics Department, King Fahd University of Petroleum and Minerals, P.O Box 5047, Dhahran 31261 (Saudi Arabia)

A detection system based on laser induced breakdown spectroscopy (LIBS) was built using 266 nm wavelength pulsed laser from the fourth harmonic of Nd:YAG laser, 500 mm spectrograph and gated ICCD camera with built-in delay generator. The LIBS system was used to study the elemental composition in coffee available in the local market of Saudi Arabia for the detection of elements in coffee samples. The LIBS spectrum of coffee sample revealed the presence magnesium, calcium, aluminum, copper, sodium, barium, bromine, cobalt, chromium, cerium manganese and molybdenum. Atomic transition line of sodium is used to study the parametric dependence of LIBS signal. The study of the dependence of LIBS signal on the laser pulse energy is proven to be linear and the dependence of LIBS signal on the time delay between the excitation and data acquisition showed a typical increase, a peak value and a decrease with the optimum excitation – acquisition delay at 400 ns.

• OSTI ID: 22609050
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1742; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
BARIUM
BEVERAGES
BROMINE
CALCIUM
CERIUM
CHROMIUM
COBALT
COPPER
DATA ACQUISITION
DETECTION
EXCITATION
MAGNESIUM
MANGANESE
MOLYBDENUM
NEODYMIUM LASERS
SODIUM
SPECTRA
SPECTROSCOPY
TIME DELAY