DEVELOPMENT OF SIMULTANEOUS DIMETHOATE, CARBARYL AND FENVALERATE EXTRACTION FROM TANGERINE (CITRUS RETICULATA BLANCO) PEEL BY USING SPE-HPLC
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): KRISANA JITMANEE , ORN-ANONG ARQUEROPANYO , TERABOON POJANAGAROON , WACHIRAPORN KHEOWMUNG
Abstract: Simultaneous extraction of three residual pesticides from different classes: dimethoate, carbaryl and fenvalerate, as representatives of organophosphate, carbamate and pyrethroid, from Tangerine (Citrus reticulata Blanco) peel was developed. The methodology was carried out by means of solvent extraction in ultrasonic bath. After that the extract was evaporated to near dryness on a vacuum rotary evaporator (40±1°C). The residue was then redissolved and followed by C18 - solid phase extraction (SPE) clean-up step. Typically, the parameters influencing the extraction such as extracting solvent, sonication time and the clean-up step condition were investigated. The determination was performed by high performance liquid chromatography (HPLC) equipped with ultraviolet detector (UV) and liquid chromatography/mass spectrometry (LC/MS). Average percentage recoveries of dimethoate, carbaryl and fenvalerate were found to be 91%, 80% and 97%, respectively. The precision with relative standard devi
- Publication Date: 21-Dec-2014
- DOI: 10.15224/978-1-63248-033-0-07
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A COMPARISON ON PM-INDUCED TOXICITY FROM EMISSIONS OF PUBLIC TRANSPORT AND AMBIENT ATMOSPHERIC CONDITIONS IN HONG KONG
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN APPLIED SCIENCE AND ENVIRONMENTAL ENGINEERING
Author(s): KA LOK CHAN , LI SUN , NIRMAL KUMAR GALI , ZHI NING , FENHUAN YANG
Abstract: Adverse health effects were noted with exposure to airborne particulate matter (PM), which is one of the important components of environmental pollution. PM in association with volatile organic compounds, transitional metals, and etcetera poses severe pulmonary and cardiovascular effects in the living beings. Complexity of its association depends on the environmental conditions such as temperature, relative humidity, etcetera and as well as on source and spatial apportionment. In a city like Hong Kong, where more than 7 million people densely populated in a small area of 426 square miles, are prone to different levels of PM exposure based on living standards. A majority of people in Hong Kong and around the world commutes through public transport (MTR train, Bus) and few others on private vehicles. Mixed emissions of these transport vehicles at MTR undergrounds, platform levels and ambient sites can lead to different levels of size segregated PM exposure. This study is aimed at compari
- Publication Date: 21-Dec-2014
- DOI: 10.15224/978-1-63248-033-0-08
- Views: 0
- Downloads: 0