An apparatus for the spectroscopic investigation of adsorbed molecules and the infra-red spectrum of formic acid on silica-supported nickel

1960 ◽  
Vol 56 ◽  
pp. 534 ◽  
Author(s):  
J. K. A. Clarke ◽  
A. D. E. Pullin
Keyword(s):  
Formic Acid ◽  
Spectroscopic Investigation ◽  
Adsorbed Molecules ◽  
Infra Red

scholarly journals Detection of organic compound signatures in infra-red, limb emission spectra observed by the MIPAS-B2 balloon instrument

2007 ◽  
Vol 7 (6) ◽  
pp. 1599-1613 ◽  
Author(s):  
J. J. Remedios ◽  
G. Allen ◽  
A. M. Waterfall ◽  
H. Oelhaf ◽  
A. Kleinert ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Formic Acid ◽  
Organic Compounds ◽  
Thermal Emission ◽  
Emission Spectra ◽  
High Spectral Resolution ◽  
Spectral Features ◽  
Model Calculations ◽  
Upper Troposphere ◽  
Infra Red

Abstract. Organic compounds play a central role in troposphere chemistry and increasingly are a viable target for remote sensing observations. In this paper, infra-red spectral features of three organic compounds are investigated in thermal emission spectra recorded on a flight on 8 May 1998 near Aire sur l'Adour by a balloon-borne instrument, MIPAS-B2, operating at high spectral resolution. It is demonstrated, for the first time, that PAN and acetone can be detected in infra-red remote sensing spectra of the upper troposphere; detection results are presented at tangent altitudes of 10.4 km and 7.5 km (not acetone). In addition, the results provide the first observation of spectral features of formic acid in thermal emission, as opposed to solar occultation, and confirm that concentrations of this gas are measurable in the mid-latitude upper troposphere, given accurate spectroscopic data. For PAN, two bands are observed centred at 794 cm−1 and 1163 cm−1. For acetone and formic acid, one band has been detected for each so far with band centres at 1218 cm−1 and 1105 cm−1 respectively. Mixing ratios inferred at 10.4 km tangent altitude are 180 pptv and 530 pptv for PAN and acetone respectively, and 200 pptv for formic acid with HITRAN 2000 spectroscopy. Accuracies are on the order of 15 to 40%. The detection technique applied here is verified by examining weak but known signatures of CFC-12 and HCFC-22 in the same spectral regions as those of the organic compounds, with results confirming the quality of both the instrument and the radiative transfer model. The results suggest the possibility of global sensing of the organic compounds studied here which would be a major step forward in verifying and interpreting global tropospheric model calculations.

scholarly journals EKSTRAKSI BAHAN HUMAT DARI BATUBARA (SUBBITUMINUS) DENGAN MENGGUNAKAN 10 JENIS PELARUT

Jurnal Solum ◽  
2007 ◽  
Vol 4 (2) ◽  
pp. 73
Author(s):  
Dewi Rezki ◽  
Fachri Ahmad ◽  
Gusnidar Gusnidar
Keyword(s):  
Humic Acid ◽  
Oxalic Acid ◽  
Formic Acid ◽  
Laboratory Experiment ◽  
Humic Substances ◽  
Functional Groups ◽  
Effective Solution ◽  
Infra Red ◽  
Bituminous Coals

This experiment was conducted to extract sub-bituminous coals for obtaining humic substances by using 10 kinds of extract solutions.  The best and effective solution was investigated and also the characteristics of humic substances soluble in those solution.  Complete Randomize Design was used to find out the effect of treatments.  Two types of coals were taken from Pasaman and Sawahlunto and the ten kinds of extract solutions were 0.1 N NaOH, 0.5 N NaOH, 0.1 M Na2CO3, 0.5 Na2CO3, 0.1 N HCl, 0.1 M Formic Acid, 0.1 M Oxalic Acid, 0.025 N HF, Ethanol 70 %, and Ethanol 90 %.  Results of this laboratory experiment showed that all ten extraction solutions had the ability to extract humic substances but in different amount.  The best solution that could be used effectively was 0.5 N NaOH.  This solution could extract 31.5 % of humic substances from Pasaman Sub-bituminous coals, but only 15.4 % could be extracted from that of Sawahlunto.  Infra Red Spectrometer was also used to identify the characteristics of functional groups appear on those humic substances extracted.Key Words: humic acid, coal

The Infra‐Red Band of Formic Acid at 7525A

1939 ◽  
Vol 7 (7) ◽  
pp. 453-455 ◽  
Author(s):  
H. W. Thompson
Keyword(s):  
Formic Acid ◽  
Infra Red
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