Thermal Lens Spectroscopy for Quantitative Determination of a Cu(II) Complex With an 8-Aminoquinoline Derivative in Tap Water and Mining Wastewater Samples Using a Dual Beam Technique

2019 ◽  
Vol 52 (16) ◽  
pp. 2607-2619 ◽  
Author(s):  
Renato Saavedra ◽  
César Soto ◽  
Cristian Poza
Keyword(s):  
Quantitative Determination ◽  
Thermal Lens ◽  
Tap Water ◽  
Thermal Lens Spectroscopy ◽  
Dual Beam ◽  
Mining Wastewater ◽  
Wastewater Samples ◽  
Beam Technique

The use of stable isotopes ratios for authentication of fruit juices

2012 ◽  
Vol 66 (2) ◽  
Author(s):  
Dana Magdas ◽  
Nicoleta Vedeanu ◽  
Romulus Puscas
Keyword(s):  
Stable Isotopes ◽  
Quantitative Determination ◽  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Tap Water ◽  
Co2 Assimilation ◽  
Fruit Juices ◽  
Added Sugar ◽  
Δ 13C

AbstractThe determination of the content of stable isotopes, 18O and 2H, respectively, in juice water facilitates the distinction between authentic juices and juices made from concentrates by redilution with tap water. At the same time, the detection of C4 cane or corn-derived sugar syrups in fruit juices which are produced from C3 fruit types is thus facilitated by the characteristic differences in 13C/12C, expressed as δ 13C (‰) values due to photosynthetic CO2 assimilation via the C3−, C4−, and crassulacean acid metabolism pathways. In this study, the quantitative determination of water added to an authentic juice, on the basis of δ 18O, and δ 2H values, respectively, was successfully performed. Also, the δ 18O, and δ 2H of juice water and δ 13C of the whole juice in 18 samples were also determined. The results obtained provided us with the possibility of distinguishing between authentic fruit juices and those obtained by redilution of concentrated fruit juices and the detection of C4 type added sugar.

Dual-beam optical fiber thermal lens spectroscopy

1991 ◽  
Vol 63 (18) ◽  
pp. 1927-1932 ◽  
Author(s):  
Dorys. Rojas ◽  
Robert J. Silva ◽  
Jonathan D. Spear ◽  
Richard E. Russo
Keyword(s):  
Optical Fiber ◽  
Thermal Lens ◽  
Thermal Lens Spectroscopy ◽  
Dual Beam
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