Pyrolysis of chlorogenic acid and rutin.

Sakuma, Hirohiko; MATSUSHIMA, Sanji; Munakata, Sachiko; Sugawara, Shirô

doi:10.1271/bbb1961.46.1311

Cited by 18 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6. A significant increase in the yield of catechol and phenol was observed when CGA was added to bright tobacco, which is consistent with previous literature results [14,21,27,29,31]. CGA also increased the yield of hydroquinone as recently reported by Dyakonov et al [14] and Torikaiu et al [32].…”

Section: Co-pyrolysis Of Tobacco With Selected Tobacco Componentssupporting

confidence: 91%

“…It has been reported that chlorogenic acid (CGA) is a significant precursor to catechol [3,21,22,27,29,31]. During the curing of burley tobacco, CGA levels decrease due to interactions of CGA with polyphenol oxidase to form CGA-quinone and this in turn can form polymeric pigments by complexing with amino acids [38,40,41].…”

Section: Comparison Of Phenolic Yields From Bright Burley and Orienmentioning

confidence: 99%

“…Most research studies carried out to-date on the formation of phenolic compounds from the pyrolysis of tobacco materials have focused on catechol and phenol, and the majority of studies have involved the pyrolysis of tobacco [21][22][23], tobacco extracts [3,22,[24][25][26], and selected tobacco components at temperatures greater than 700 8C [21,24,[27][28][29][30]. Despite numerous papers addressing the formation of selected phenolic compounds, there is little information available in the current literature on their temperature of formation.…”

Section: Introductionmentioning

confidence: 99%

“…Despite numerous papers addressing the formation of selected phenolic compounds, there is little information available in the current literature on their temperature of formation. Selected tobacco constituents such as chlorogenic acid, caffeic acid, rutin, quercetin, cellulose, pectin, and lignin have all been previously identified as potential precursors of catechol, phenol, and cresols [14,21,24,27,29,31]. While hydroquinone has been detected in cigarette smoke at levels similar to catechol for reference cigarettes [13], relatively little information is available on the formation and yields of hydroquinone from different tobaccos or selected tobacco components [14,26,32].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phenolic compound formation from the low temperature pyrolysis of tobacco

McGrath

Brown

Meruva

et al. 2009

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

Section: Co-pyrolysis Of Tobacco With Selected Tobacco Componentssupporting

confidence: 91%

Section: Comparison Of Phenolic Yields From Bright Burley and Orienmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phenolic compound formation from the low temperature pyrolysis of tobacco

McGrath

Brown

Meruva

et al. 2009

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

“…It is also the single specie of this family that is available for market [3,19]. For these reasons, it is often used as a benchmark [20] to study the chemistry of CGA consumption due to chemical oxidation [7,11,21], enzyme action [8], pyrolysis [22][23][24][25] and heating in liquid water [12,26] or superheated steam [6].…”

Section: Introductionmentioning

confidence: 99%

A shrinking core model for slow combustion of solid 5-O-caffeoylquinic acid

Zanoelo

Benincá

2011

Reac Kinet Mech Cat

View full text Add to dashboard Cite

The oxidation of 5-O-caffeoylquinic acid (5-CQA) was investigated in the temperature range from 161 to 188°C. The kinetic experiments were carried out in small batch reactors made of glass, where a very thin (1.1 lm) fixed bed of powder 5-CQA was in contact with air at approximately 91.4 kPa. Aqueous 5-CQA solutions were prepared with the solid found in the reactors at different reaction times and used to measure the decrease of 5-CQA concentrations with a spectrophotometer operated at 323 nm. A shrinking core model was applied to describe the non-catalytic heterogeneous reaction between 5-CQA and oxygen. It basically assumes mass transfer of O 2 from bulk air to the outer surface of nonporous particles of solid 5-CQA, where an irreversible reaction with no formation of solid products takes place. The proposed model correctly reproduced the obtained kinetic results in all the investigated operating conditions when an exponential reduction of external area of solid with reaction time was taken into account. Arrhenius-type expressions successfully described the dependence of the calculated global reaction and shrinking rate constants on temperature. An activation energy close to 77046 J mol -1 was found for the slow combustion reaction of 5-CQA.Keywords 5-CQA Á CGA Á Chlorogenic acids Á Shrinking core model Á Slow combustion Abbreviations aExternal surface area of solid per initial volume of bed (m 2 m -3 ) a i Initial external surface area of solid per initial volume of bed (m 2 m -3 ) AAbsorbance of aqueous solution of 5-CQA (mAu) k c External coefficient of mass transfer (m s -1 )

show abstract

A new strategy for quality control and qualitative analysis of Yinhuang preparations by HPLC-DAD-MS/MS

Chen

Han

et al. 2012

Anal Bioanal Chem

View full text Add to dashboard Cite

A combinative method using fingerprint analysis (FA) and multi-ingredients quantification (MIQ) was developed and validated for the quality control of Yinhuang (YH) preparations including granule, capsule, and lozenge by high-performance liquid chromatography coupled with diode array detection (HPLC-DAD). Common peaks with or without standard references in FA were confirmed or identified by electrospray ionization tandem mass spectrometry (ESI-MS/MS). The chromatographic separations were achieved on a Sepax GP-C(18) column (250 mm × 4.6 mm i.d., 5 μm) with a gradient elution using a mixture of 0.1 % formic acid methanol solution and 0.1 % formic acid water solution. In quantitative analysis, nine bioactive constituents (chlorogenic acid, caffeic acid, luteoloside, baicalin, luteolin, wogonoside, baicalein, wogonin, and oroxylin A) were simultaneously determined. The detection wavelength was set at 275 nm, 320 nm, and 350 nm according to the absorption properties of the nine quantified compounds. The linearity, recovery, intraday and interday precision, accuracy, limit of detection (LOD) and quantification (LOQ), repeatability and stability were all tested and good results were obtained. In the FA, 320 nm was selected. The correlation coefficients of similarity were determined on the basis of the relative retention time (RRT) and relative peak area (RPA) of 20 common peaks in chromatographic fingerprints. Results indicated that both the RRT and RPA of 20 common peaks shared a close similarity. From the 20 common peaks, 18 compounds, including the nine quantified compounds, were identified or tentatively characterized by comparing their retention times, UV spectra, and MS spectra with those of standard compounds or literature data. The study not only presents a powerful and reliable analytical tool for the quality control of YH preparations, but also provides the chemical evidence for revealing the material basis of their therapeutic effects.

show abstract

Pyrolysis of chlorogenic acid and rutin.

Cited by 18 publications

References 0 publications

Phenolic compound formation from the low temperature pyrolysis of tobacco

Phenolic compound formation from the low temperature pyrolysis of tobacco

A shrinking core model for slow combustion of solid 5-O-caffeoylquinic acid

A new strategy for quality control and qualitative analysis of Yinhuang preparations by HPLC-DAD-MS/MS

Contact Info

Product

Resources

About