scholarly journals Difference-frequency-generator�??based spectrometer at 3 μm for high-sensitivity C2H2 and H2O detection

2003 ◽  
Vol 11 (23) ◽  
pp. 3010 ◽  
Author(s):  
G. Rusciano ◽  
G. Pesce ◽  
F. Pignatiello ◽  
A. Sasso
Keyword(s):  
High Sensitivity ◽  
Difference Frequency ◽  
Difference Frequency Generator ◽  
Frequency Generator

Efficient difference-frequency generator utilizing an Al2O3:Ti3+laser

1991 ◽  
Vol 21 (5) ◽  
pp. 503-507 ◽  
Author(s):  
S G Bartoshevich ◽  
I V Mikhnyuk ◽  
G A Skripko ◽  
I G Tarazevich
Keyword(s):  
Difference Frequency ◽  
Difference Frequency Generator ◽  
Frequency Generator

Pulsed cavity ring-down spectrometer at 3 µm based on difference frequency generation for high-sensitivity CH4 detection

2015 ◽  
Vol 121 (4) ◽  
pp. 533-539 ◽  
Author(s):  
C. Bahrini ◽  
Y. Bénilan ◽  
A. Jolly ◽  
B. Lebert ◽  
X. Landsheere ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Frequency Generation ◽  
Cavity Ring Down

scholarly journals Determination of hafnium in zirconium materials

2019 ◽  
Vol 85 (1II)) ◽  
pp. 56-59
Author(s):  
M. A. Dombrovskya ◽  
D. G. Lisienko ◽  
O. Yu. Shafar
Keyword(s):  
Arc Discharge ◽  
High Sensitivity ◽  
Analytical Signal ◽  
Graphite Powder ◽  
Atomic Emission ◽  
Relative Standard ◽  
Spectrum Excitation ◽  
Frequency Generator ◽  
Ac Arc ◽  
Ac Arc Discharge

An arc atomic emission technique of hafnium determination in zirconium is developed and tested. The study was carried out on a PGS-2 spectrometer equipped with MAÉS analyzer and information processing software «Atom 3.3». («VMK-Optoélektronika», Novosibirsk). Excitation of spectra of pre-oxidized metal was carried out using a medium-frequency generator «Vesuvius» («VMK-Optoélektronika», Novosibirsk). Analytical line of hafnium was free of spectral overlap with the lines of zirconium. We have set a current of the AC arc discharge (20 A), exposure time (30 sec) and the form of the electrode into which the sample is placed («narrow crater») are selected. The effect of buffering additives (graphite powder, bismuth fluoride) on the intensity of the analyte lines was studied. It is shown that high sensitivity of the analyte is observed for oxidized material without additives. Reduction of the random error attributed to the influence of conditions of spectrum excitation and sample preparation is achieved using the intensity ratio of the analyte line and zirconium as an analytical signal. Recommendations regarding preparation of the samples for calibration are given. The lower limit of the determined concentration is 0.01% with a relative standard deviation in repeatability 3%.

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