A Facile Solid-Phase Micro-Extraction Fiber Based on Pine Needles Biochar Coating for Extraction of Polychlorinated Biphenyls from Water Samples

Utilization of magnetic pomelo peel‐derived biochar for extraction and liquid chromatography‐mass spectrometry determination of opioid drugs in wastewaters

“…Biochar is defined as porous carbon material produced from the pyrolytic processing of abundant biomass. It has attracted significant interest in sample preparation [13][14][15][16][17][18][19]. For example, biochar derived from pine needles or marine algae, which acted as SPME coatings, could efficiently extract polychlorinated biphenyls and chlorobenzenes from water samples [13,14].…”

“…It has attracted significant interest in sample preparation [13][14][15][16][17][18][19]. For example, biochar derived from pine needles or marine algae, which acted as SPME coatings, could efficiently extract polychlorinated biphenyls and chlorobenzenes from water samples [13,14]. Magnetic biochars, derived from citrus and pomelo peel, straw, and bamboo, were proved to be effective enrichment materials for pesticides, pollutants, and fentanyls [15][16][17][18].…”

Emerging materials for sample preparation

“…SPME was carried out by direct immersion of the fiber in the sample. A biochar‐coated fiber obtained by a dip coating method was prepared following a facile route based on the thermal decomposition of pine needles under limited supply or absence of oxygen . The obtained biochar was incorporated onto a stainless steel wire using epoxy glue.…”

Preparation of bamboo‐derived magnetic biochar for solid‐phase microextraction of fentanyls from urine

“…Previous studies have shown that biochar exhibited excellent performance for heavy metals and pollutants removal [14][15][16]. However, to the best of our knowledge, limited studies have been reported on the use of biochars derived from agricultural biomass in field of sample pretreatment [17][18][19][20][21][22]. For example, pine needle and Ulva lactuca biochars coated SPME fibers [17,18], Cocos nucifera QuEChERS adsorbent [19], and magnetic citrus peel biochar [20] have been developed in the enrichment of trace substances (polychlorinated biphenyls, chlorobenzenes, phthalate esters, and pesticides) from complex samples, respectively.…”

“…However, to the best of our knowledge, limited studies have been reported on the use of biochars derived from agricultural biomass in field of sample pretreatment [17][18][19][20][21][22]. For example, pine needle and Ulva lactuca biochars coated SPME fibers [17,18], Cocos nucifera QuEChERS adsorbent [19], and magnetic citrus peel biochar [20] have been developed in the enrichment of trace substances (polychlorinated biphenyls, chlorobenzenes, phthalate esters, and pesticides) from complex samples, respectively. Recently, we have examined the use of magnetic straw-derived biochar for the extraction of organophosphorus pesticides from environmental samples [21].…”