Authentication of geographical growth origin of black pepper (piper nigrum l.) based on volatile organic compounds profile: A case study for Malaysia and India black peppers

2019 ◽  
Author(s):  
Zehnder J. A. Mercer ◽  
Hong Siang Chua ◽  
Peter Mahon ◽  
Siaw San Hwang ◽  
Sing Muk Ng
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Black Pepper ◽  
Piper Nigrum ◽  
Volatile Organic

scholarly journals Profile of the volatile organic compounds of pink pepper and black pepper

2021 ◽  
Vol 14 (12) ◽  
Author(s):  
Yuri Gomes Figueiredo ◽  
Fabio Corrêa Bueno ◽  
Afonso Henrique de Oliveira Júnior ◽  
Ana Carolina do Carmo Mazzinghy ◽  
Henrique de Oliveira Prata Mendonça ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Solid Phase Microextraction ◽  
Mass Spectra ◽  
Solid Phase ◽  
Black Pepper ◽  
Piper Nigrum ◽  
Gas Chromatograph ◽  
Centers Of Origin ◽  
Volatile Organic

Black pepper (Piper nigrum L.) and pink pepper (Schinus terebinthifolius Raddi) are two plant-based spices, which despite having a common popular name, have a botanical family and distinct centers of origin. Its fruits are known worldwide in cuisine as condiments; in addition, the extraction of essential oil from these species is interesting from a pharmacological and industrial perspective. In this sense, the present study aimed to analyze the chemical profile of volatile organic compounds (VOC's) present in black pepper and pink pepper. The solid phase microextraction method in headspace mode (HS-SPME) was used, using the fiber, polydimethylsiloxane-divinylbenzene (PDMS/DVB) for the extraction of VOCs. In the extraction of volatile compounds, 2g of the seeds of each sample were used, previously ground in an analytical mill, and placed in a 20 ml headspace flask. The adsorption of the compounds was carried out at a temperature of 60ºC, for 20 minutes, with the exposed PDMS/DVB fiber, after extraction, the desorption was carried out in the gas chromatograph injector coupled to mass spectrometry (CG-MS), where the fiber was exposed for 5 minutes. The identification of VOCs was performed by comparing the mass spectra obtained with data from the NIST library. Thirty-six volatile organic compounds (VOCs) were identified and quantified among pink pepper and black pepper seed samples. Of which 16 were found in black pepper, and 20 in pink pepper. These compounds are divided into monoterpenes, sesquitepenes, and other classes such as alkaloids and sesquiterpenoids. The volatile organic compounds found in higher concentrations in black pepper were Carnegine with 36.32 %, beyerene (30.84%), alpha-gurjunene (6.10%) and 1R,4S,7S,11R-2, 2,4,8-Tetramethyltricyclo [5.3.1.0 (4.11)] undec-8-ene also with 6.10%. In pink pepper, the compounds with the highest concentrations were, phyllocladene (36.16%), 3-carene (12.49%), and 1R,4S,7S,11R-2,2,4,8-tetramethyltricyclo [ 5.3.1.0 (4.11)] undec-8-ene (12.43%).

scholarly journals An Integrated Method for Factor Number Selection of PMF Model: Case Study on Source Apportionment of Ambient Volatile Organic Compounds in Wuhan

Atmosphere ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 390 ◽  
Author(s):  
Fenjuan Wang ◽  
Zhenyi Zhang ◽  
Costanza Acciai ◽  
Zhangxiong Zhong ◽  
Zhaokai Huang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Source Apportionment ◽  
Correlation Coefficient ◽  
Organic Compounds ◽  
Industrial Emissions ◽  
Integrated Method ◽  
Pmf Model ◽  
Volatile Organic ◽  
Measurement Period

The positive matrix factorization (PMF) model is widely used for source apportionment of volatile organic compounds (VOCs). The question about how to select the proper number of factors, however, is rarely studied. In this study, an integrated method to determine the most appropriate number of sources was developed and its application was demonstrated by case study in Wuhan. The concentrations of 103 ambient volatile organic compounds (VOCs) were measured intensively using online gas chromatography/mass spectrometry (GC/MS) during spring 2014 in an urban residential area of Wuhan, China. During the measurement period, the average temperature was approximately 25 °C with very little domestic heating and cooling. The concentrations of the most abundant VOCs (ethane, ethylene, propane, acetylene, n-butane, benzene, and toluene) in Wuhan were comparable to other studies in urban areas in China and other countries. The newly developed integrated method to determine the most appropriate number of sources is in combination of a fixed minimum threshold value for the correlation coefficient, the average weighted correlation coefficient of each species, and the normalized minimum error. Seven sources were identified by using the integrated method, and they were vehicular emissions (45.4%), industrial emissions (22.5%), combustion of coal (14.7%), liquefied petroleum gas (LPG) (9.7%), industrial solvents (4.4%), and pesticides (3.3%) and refrigerants. The orientations of emission sources have been characterized taking into account the frequency of wind directions and contributions of sources in each wind direction for the measurement period. It has been concluded that the vehicle exhaust contribution is greater than 40% distributed in all directions, whereas industrial emissions are mainly attributed to the west southwest and south southwest.

Characteristics of roadside volatile organic compounds in an urban area dominated by gasoline vehicles, a case study in Hanoi

Chemosphere ◽  
2020 ◽  
Vol 254 ◽  
pp. 126749 ◽  
Author(s):  
Bich-Thuy Ly ◽  
Yoshizumi Kajii ◽  
Thi-Yen-Lien Nguyen ◽  
Koki Shoji ◽  
Dieu-Anh Van ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Urban Area ◽  
Organic Compounds ◽  
Gasoline Vehicles ◽  
Volatile Organic

Chemical Oxidation Treatment for Semi Volatile Organic Compounds Contaminated Brownfield Site: A Case Study

2011 ◽  
Vol 414 ◽  
pp. 317-322 ◽  
Author(s):  
Yan Fei Wei ◽  
Zhong Zhong ◽  
Zhen Yu Gu ◽  
Zhi Qiu ◽  
Chang Bo Zhang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chemical Oxidation ◽  
Provincial Government ◽  
Zhejiang Province ◽  
Oxidation Treatment ◽  
Brownfield Sites ◽  
Volatile Organic ◽  
Concentration Changes

Brownfield, as a result of old and polluting industries being relocated away from urban areas, is an emerging problem since these contaminated lands pose and obstacle to urban and economic development. Semi Volatile Organic Compounds (SVOCs) are common contaminants found in brownfield sites that used to be manufacturing industries or agrochemical plants. Chemical oxidation has the potential to provide rapid, cost-effective treatment for brownfield contaminated with SVOCs. In this study, a pilot study of chemical oxidation was demonstrated for brownfield remediation in a specific site that used to be an agrochemical plant in Jiaxing, Zhejiang Province. Preliminary site characterization suggested that the site was primarily contaminated by o-anisidine and its derivatives with trace amount of o-nitrochlorobenzene and other chemicals. The contaminants soil was pretreated and mixed with two selected oxidants at different soil-to-oxidant ratio. Soil samples were collected and analyzed before and after the treatments to compare the concentration changes of primary contaminants. The results showed that combinations of TA-1 oxidant and AOP-2 oxidant with several different ratios could provide 90% or more removal of targeted contaminants in two weeks, with an average cost of oxidants per ton of soil around 400 RMB. This is the first report for brownfield remediation case study in Zhejiang since “Clean Soil Action” was initiated by Zhejiang Provincial Government. The successful treatment for SVOCs contaminated brownfield in this study would promote chemical oxidation treatment to be employed in brownfield sites with similar situations in Zhejiang province in the future.

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