Optimization of headspace solid-phase microextraction gas chromatography-atomic emission detection analysis of monomethylmercury

Dithizone-functionalized solid phase extraction–displacement elution-high performance liquid chromatography–inductively coupled plasma mass spectrometry for mercury speciation in water samples

“…Baker (Phillipsburg, NJ, USA). Analytical grade HCOOH, HCOONa, NH 3 ·H 2 O, NH 4 Ac, Na 2 S 2 O 3 , cysteine, NaCl as well as GR grade KOH, HCl, HNO 3 were from Beijing Chemical Factory (Beijing, China). Humic acid was from Aldrich (Aldrich, Milwaukee, Wisconsin).…”

“…Stock solution of inorganic mercury (IHg) (1 mg mL −1 as Hg) was prepared by dissolving HgCl 2 (≥99.5%, Beijing Chemical Factory, Beijing, China) in 5% (v/v) HNO 3 . Individual stock solutions of organomercury chloride (1 mg mL −1 as Hg) were prepared by dissolving methylmercury chloride (MeHg) and ethylmercury chloride (EtHg) in methanol, respectively.…”

“…Moreover, the ethylation-based method cannot be used for ethylmercury determination. In recent years, other pre-concentration methods were reported including solid phase micro-extraction [3][4][5], liquid phase micro-extraction [6][7][8], cloud point extraction [9,10] and solid phase extraction (SPE) [11][12][13][14][15][16][17][18][19]. For solid phase micro-extraction, derivatization procedure such as hyride, ethylation or phenylation derivatization is often necessary to transform inoganic mercury (IHg) and organomercurials into their volatile species.…”

Evaluation of Volatile Compounds of “Tiger Nut Beverage” (Orxata de Xufla) Headspace by Optimized Solid-Phase Micro-Extraction

“…Fiber coatings often consist of two or three components, recovery capabilities of which are based on phenomena like absorption (PDMS) and adsorption (CAR/PDMS) [12]. Polyacrylate-coated fiber (PA) is used to extract very polar analytes from polar samples.…”

Preparation of a high pH-resistant AAPTS-silica coating and its application to capillary microextraction (CME) of Cu, Zn, Ni, Hg and Cd from biological samples followed by on-line ICP-MS detection

“…Though the coating material plays a fundamentally important role in CME which determines its polarity, selectivity and extraction efficiency, the capillaries used at present are mainly commercial GC capillary columns [20,21]. Therefore, it is essential to develop more selective, stable and efficient coating materials for CME.…”