The decomposition of straw in soil: use of Multiple Internal Reflectance Infrared Spectroscopy

1993 ◽  
Vol 44 (4) ◽  
pp. 693-702 ◽  
Author(s):  
M. V. CHESHIRE ◽  
J. D. RUSSELL ◽  
A. R. FRASER
Keyword(s):  
Infrared Spectroscopy ◽  
Internal Reflectance

Infrared Spectroscopy of Aqueous Antibiotic Solutions

1984 ◽  
Vol 38 (1) ◽  
pp. 32-35 ◽  
Author(s):  
James S. Wong ◽  
Alan J. Rein ◽  
Donald Wilks ◽  
Paul Wilks
Keyword(s):  
Aqueous Solution ◽  
Infrared Spectroscopy ◽  
Aqueous Solutions ◽  
Fermentation Broth ◽  
Analytical Sensitivity ◽  
Beta Lactam ◽  
Lactam Carbonyl ◽  
Ft Ir ◽  
Internal Reflectance ◽  
Ft Ir Spectroscopy

Infrared spectra of aqueous antibiotic solutions were obtained using a new Liquid Analyzer accessory in a Fourier transform infrared (FT-IR) spectrometer. Based on a cylindrical internal reflectance element, the Liquid Analyzer accessory provides a sufficiently short (∼0.015 mm) effective pathlength for infrared spectroscopy of aqueous solutions from 3200 to 800 cm−1, Spectra of aqueous solutions of penicillin VK, sodium oxacillin and sodium methicillin are shown. By measuring the absorbante of the beta-lactam carbonyl band, FT-IR spectroscopy with the accessory exhibits analytical sensitivity to less than 0.1% concentration by weight of antibiotic both in aqueous solution and in an actual fermentation broth.

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