Analysis of abietic acid and dehydroabietic acid in food samples by in-tube solid-phase microextraction coupled with liquid chromatography–mass spectrometry

Determination of polycyclic aromatic hydrocarbons in food samples by automated on-line in-tube solid-phase microextraction coupled with high-performance liquid chromatography-fluorescence detection

“…We have already developed an in-tube SPME method, coupled with HPLC [32,33] and LC-MS [34][35][36], for determination of various compounds in food samples. The details of the in-tube SPME technique and its applications have been summarized in some reviews [37][38][39].…”

Development of ultrasonic-assisted closed in-syringe extraction and derivatization for the determination of labile abietic acid and dehydroabietic acid in cosmetics

“…The intra-day and inter-day precisions were found to be within 1.29-2.56% and 1.89-2.84%, respectively. In comparison with previous reports [4,[29][30][31][32][33], this method provided more accurate and precise determination for the two resin acids AA and DHAA. Table 2 Linearity, reproducibility of retention time and peak area (n = 6), limit of detection (LOD), limit of quantification (LOQ) and limit of analyte concentration (LOAC) for determination of abietic acid (AA) and dehydroabietic acid (DHAA) with fluorescence detection.…”

“…Though pre-concentration can lower the detection limits, AA and DHAA are usually present in complex matrixes and thus the interferences components will be also concentrated together. In this case, multi-step manual operations such as solid-phase extraction (SPE) [4,29,30,32] or solid-phase microextraction (SPME) [33] are usually required, otherwise it will be difficult to both avoid interferences [32] and lower detection limits [4]. However, multi-step operations are tedious, time-consuming, and more seriously, tend to cause high errors to labile analytes.…”

“…[27] and thus may lead to inaccurate results. High performance liquid chromatography (HPLC) coupled with ultraviolet/diode array detection (UV/DAD) [4,[28][29][30][31][32], fluorescence detection (FLD) [29][30][31][32] or MS [25,26,31,33] has been extensively developed, acting as more accurate alternative to GC for analytes susceptible to high temperature. Due to weak chromophore in their molecules, trace resin acids are difficult to directly detect with relatively high detection limits provided by these methods.…”

Preparation of Open Tubular Solid-Phase Extraction Column with 5-Amino-8-hydroxyquinoline-modified Gold Nanoparticle Phase for the Enrichment of Heavy Metal Ions

“…For example, a Supel-Q porous layer open tubular capillary column is used for in-tube solid phase microextraction. 9,10 From the viewpoints of its high specific surface area and ease of preparation, gold nanoparticle (GNP) is an attractive material for the inner wall modification. Recently, dodecanethiol-capped GNPs were immobilized on the inner wall of a silica capillary tube and were used as the stationary phase for gas chromatography [11][12][13] or open tubular electrochromatography [14][15][16] columns.…”