Combination of graphene oxide-based solid phase extraction and electro membrane extraction for the preconcentration of chlorophenoxy acid herbicides in environmental samples

Carbon nanomaterials: production, impact on plant development, agricultural and environmental applications

“…CNT-based gas sensors for ammonia detection can be used for trace gas measurements [103]. Sensors to detect pesticides, herbicides and their metabolites in environmental samples have been developed based on modified MWCNTs [104,105] or on GO [106]. Moreover, nanosensors have been employed for monitoring soil moisture [107].…”

Recent advances in applications of nanomaterials for sample preparation

“…Such distinct adsorption mechanisms have been adopted for extraction of metal ions such as Pb 2+ , Cd 2+ , Sb 3+ , Bi 3+ [13][14][15] and some hydrophilic target molecules [16,17]. Although oxidation is not an effective way to provide sufficient specificity towards certain analytes, it does open a way to functionalization of CNPs with more selective and specific functional groups through further modification of the active oxygen-containing groups on oxidized CNPs.…”

Fenugreek hydrogel–agarose composite entrapped gold nanoparticles for acetylcholinesterase based biosensor for carbamates detection

“…This sensor could detect pirimicarb with a limit of detection (LOD) 0.532 ng L -1 . Another AChE biosensor developed using polyaniline and multiwalled carbon nanotubes core-shell modified glassy carbon electrode, detected carbamate M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 pesticides in fruits and vegetables, with LOD of 1.4 and 0.95 µM for carbaryl and methomyl, respectively [10]. In another study, Assis et al,. reported an AChE-based optical biosensor which detected two carbamates (carbaryl and carbofuran) at concentrations of 33.8 and 0.92 µM, respectively [11].…”

“…Several analytical methods can be used to detect pesticides with high sensitivity, but they often involve tedious sample preparation steps, and they need to be conducted by highly skilled personnel, using expensive equipment [3][4][5][6]. Consequently, there is an impetus to develop biosensors for detecting pesticides, with an objective of simplifying or eliminating sample preparation, with less technical expertise and analytical equipment.…”