Electrogenerated chemiluminescence. 38. Emission intensity-time transients in the tris(2,2'-bipyridine)ruthenium(II) system

1981 ◽  
Vol 85 (9) ◽  
pp. 1155-1159 ◽  
Author(s):  
J. D. Luttmer ◽  
Allen J. Bard
Keyword(s):  
Emission Intensity ◽  
Electrogenerated Chemiluminescence

Quantification of electrogenerated chemiluminescence from tris(bipyridine)ruthenium(ii) and hydroxyl ions

2020 ◽  
Vol 22 (27) ◽  
pp. 15413-15417 ◽  
Author(s):  
Andrea Fiorani ◽  
Giovanni Valenti ◽  
Irkham ◽  
Francesco Paolucci ◽  
Yasuaki Einaga
Keyword(s):  
Emission Intensity ◽  
Reaction Rate ◽  
Electrogenerated Chemiluminescence

In this work, we quantify the electrogenerated chemiluminescence arising from the reaction of electrogenerated tris(bipyridine)ruthenium(iii) with hydroxyl ions, in terms of emission intensity and reaction rate.

Characterization of Amethysts from Sukamara, Central Kalimantan, Using Laser-Induced Breakdown Spectroscopy (LIBS)

2020 ◽  
Vol 1 (2) ◽  
pp. 5-8
Author(s):  
Komang Gde Suastika, Heri Suyanto, Gunarjo, Sadiana, Darmaji
Keyword(s):  
Emission Intensity ◽  
Laser Energy ◽  
Emission Spectra ◽  
Atomic Emission ◽  
Laser Induced Breakdown Spectroscopy ◽  
Chemical Formula ◽  
Central Kalimantan ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Abstract - Laser-Induced Breakdown Spectroscopy (LIBS) is one method of atomic emission spectroscopy using laser ablation as an energy source. This method is used to characterize the type of amethysts that originally come from Sukamara, Central Kalimantan. The result of amethyst characterization can be used as a reference for claiming the natural wealth of the amethyst. The amethyst samples are directly taken from the amethyst mining field in the District Gem Amethyst and consist of four color variations: white, black, yellow, and purple. These samples were analyzed by LIBS, using laser energy of 120 mJ, delay time detection of 2 μs and accumulation of 3, with and without cleaning. The purpose of this study is to determine emission spectra characteristics, contained elements, and physical characteristics of each amethyst sample. The spectra show that the amethyst samples contain some elements such as Al, Ca, K, Fe, Gd, Ba, Si, Be, H, O, N, Cl and Pu with various emission intensities. The value of emission intensity corresponds to concentration of element in the sample. Hence, the characteristics of the amethysts are based on their concentration value. The element with the highest concentration in all samples is Si, which is related to the chemical formula of SiO2. The element with the lowest concentration in all samples is Ca that is found in black and yellow amethysts. The emission intensity of Fe element can distinguish between white, purple, and yellow amethyst. If Fe emission intensity is very low, it indicates yellow sample. Thus, we may conclude that LIBS is a method that can be used to characterize the amethyst samples.Key words: amethyst, impurity, laser-induced, breakdown spectroscopy, characteristic, gemstones

Modulation of geoacoustic emission intensity by time-varying electric field

2017 ◽  
Vol 17 (1) ◽  
pp. 1-9 ◽  
Author(s):  
V. A. Gavrilov ◽  
A. V. Naumov
Keyword(s):  
Electric Field ◽  
Emission Intensity ◽  
Time Varying ◽  
Geoacoustic Emission
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