Rapid screening and characterization of natural antioxidants in Polygonum viviparum by an on-line system integrating the pressurised liquid micro-extraction, HPLC-DAD-QTOF-MS/MS analysis and antioxidant assay

Abstract Contaminated groundwater samples were characterized using on-line thermal desorption GC-MS analysis. The results were compared with conventional solvent extraction method followed by GC-MS analysis. Thermal desorption gave similar results for most compounds and was found to be superior for the analysis of water-miscible compounds. HPLC with a diode-array detector was used to measure phenol in the presence of large quantities of aniline.

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Description and characterization of an on-line system for long-term measurements of isoprene, methyl vinyl ketone, and methacrolein in ambient air

Journal of Chromatography A ◽

10.1016/s0021-9673(03)00518-1 ◽

2003 ◽

Vol 995 (1-2) ◽

pp. 185-201 ◽

Cited By ~ 17

Author(s):

M KOMENDA ◽

A SCHAUB ◽

R KOPPMANN

Keyword(s):

Ambient Air ◽

Vinyl Ketone ◽

Methyl Vinyl Ketone ◽

Line System ◽

Methyl Vinyl ◽

On Line

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System characterization of dynamic biological systems through improved data analysis.

10.1101/2021.05.14.442977 ◽

2021 ◽

Author(s):

Gerben R Stouten ◽

Sieze Douwenga ◽

Carmen Hogendoorn ◽

Robbert Kleerebezem

Keyword(s):

Data Analysis ◽

Process Model ◽

System Analysis ◽

Close Monitoring ◽

Line System ◽

Wide Range ◽

System Characterization ◽

On Line ◽

Batch Bioreactors

Determining the functional development and dominant competitive strategy in microbial community enrichments is complicated by the extensive measurement campaigns required for off-line system analysis. This study demonstrates that detailed system characterization of aerobic pulse fed enrichments can be established using on-line measurements combined with automated data analysis. By incorporating the physicochemical processes in on-line data processing with a Particle Filter and kinetic process model, an accurate reconstruction of the dominant biological rates can be made. We hereby can differentiate between storage compound production and biomass growth in sequencing batch bioreactors. The method proposed allows for close monitoring of changes in functional behavior of long-running enrichment cultures, without the need for off-line samples, therewith enabling the identification of new insights in process dynamics with a minimal experimental effort. Even though a specific example application of the method proposed is described here, the approach can readily be extended to a wide range of dynamic experimental systems that can be characterized based on on-line measurements.

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Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

Revista de Chimie ◽

10.37358/rc.19.12.7797 ◽

2020 ◽

Vol 70 (12) ◽

pp. 4594-4600

Keyword(s):

Thermogravimetric Analysis ◽

Food Industry ◽

Wood Waste ◽

Biomass Ash ◽

Minor Elements ◽

Ms Analysis ◽

Icp Ms ◽

Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

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Generic monitoring tools for water characteristics assessment

Water Science & Technology Water Supply ◽

10.2166/ws.2003.0124 ◽

2003 ◽

Vol 3 (1-2) ◽

pp. 351-357

Author(s):

S. Le Bonté ◽

M.-N. Pons ◽

O. Potier ◽

S. Chanel ◽

M. Baklouti

Keyword(s):

Municipal Wastewater ◽

Principal Component ◽

Toxic Substances ◽

Capacity Curves ◽

Water Characteristics ◽

Monitoring Tools ◽

Visible Spectra ◽

On Line ◽

Mining Procedure

An adaptive principal component analysis applied to sets of data provided by global analytical methods (UV-visible spectra, buffer capacity curves, respirometric tests) is proposed as a generic procedure for on-line and fast characterization of wastewater. The data-mining procedure is able to deal with a large amount of information, takes into account the normal variations of wastewater composition related to human activity, and enables a rapid detection of abnormal situations such as the presence of toxic substances by comparison of the actual wastewater state with a continuously updated reference. The procedure has been validated on municipal wastewater.

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