Solid-state transformation of erythromycin A dihydrate during drying monitored by near infrared spectroscopy

2007 ◽  
Vol 32 (1) ◽  
pp. S48
Author(s):  
M. Römer ◽  
J. Heinämäki ◽  
I. Miroshnyk ◽  
N. Kivikero ◽  
N. Sandler ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
State Transformation ◽  
Solid State Transformation ◽  
Erythromycin A

Rapid Estimation of Xanthan and Biomass Concentration during Xanthan Production under Solid State Fermentation on Polyurethane Foam with Near–Infrared Spectroscopy

2012 ◽  
Vol 482-484 ◽  
pp. 1515-1519
Author(s):  
Zhi Guo Zhang ◽  
Hong Zhang Chen
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Polyurethane Foam ◽  
Near Infrared Spectroscopy ◽  
Solid State Fermentation ◽  
Near Infrared ◽  
External Validation ◽  
Biomass Concentration ◽  
Inert Support ◽  
Xanthan Production

Recently, some solid state fermentation (SSF) processes of xanthan production were studied. However, quantitative analysis of the concentration of xanthan and biomass is more complicated than that of submerged fermentation. To facilitate the analysis of these components, near–infrared spectroscopy (NIRS) was used. A NIRS calibration models for rapidly estimating xanthan and biomass concentration in xanthan fermentation on inert support of polyurethane foam was established. The wavenumber and spectral pretreatment method were optimized. The data of cross validation and external validation shows that NIRS was suitable for rapid and accurate quantification of the concentration of xanthan and biomass in solid state fermentation on inert support. This method will provide much convenience for the research of solid state fermentation on inert support.

Determination of Ephedrine Hydrochloride in Mixtures of Ephedrine Hydrochloride and Pseudoephedrine Hydrochloride Using near Infrared Spectroscopy

2005 ◽  
Vol 13 (3) ◽  
pp. 155-160 ◽  
Author(s):  
Yanga K. Dijiba ◽  
Thomas M. Niemczyk
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Near Infrared Spectroscopy ◽  
Diffuse Reflectance ◽  
Near Infrared ◽  
Minor Component ◽  
Ephedrine Hydrochloride ◽  
Calibration Samples ◽  
Precision And Accuracy

There are a number of situations where there is a need to determine the concentrations of components in solid-state mixtures without dissolving the samples. The experiments described here were designed to demonstrate that diffuse reflectance near infrared spectroscopy coupled with partial least squares (PLS) data analysis can be used to determine the minor component in a mixture of structurally-similar solid-state compounds, in this case mixtures of ephedrine hydrochloride and pseudoephedrine hydrochloride. It is shown that when care is taken to produce homogeneous calibration samples very good results can be obtained; in this case, cross-validated standard error of predictions of 2.30 wt% when the minor component spanned the concentration range of 0 to 50 wt% and 0.30 wt% when the minor component spanned the concentration range of 0 to 5 wt%. Results are presented that indicate that the amount of data available to the PLS calibration routine relative to the range over which the calibration is performed can limit the precision and accuracy of the determinations.

Quantitative Detection of Ethanol Solid-State Fermentation Process Parameters Based on Near Infrared Spectroscopy

2017 ◽  
Vol 54 (2) ◽  
pp. 023002
Author(s):  
张航 Zhang Hang ◽  
刘国海 Liu Guohai ◽  
江辉 Jiang Hui ◽  
梅从立 Mei Congli ◽  
黄永红 Huang Yonghong
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Near Infrared Spectroscopy ◽  
Process Parameters ◽  
Solid State Fermentation ◽  
Fermentation Process ◽  
Near Infrared ◽  
Quantitative Detection
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