Azeem, Hafiz Abdul published the artcileExtending the scope of dispersive liquid-liquid microextraction for trace analysis of 3-methyl-1,2,3-butanetricarboxylic acid in atmospheric aerosols leading to the discovery of iron(III) complexes, Recommanded Product: n-Octanol, the main research area is dispersive liquid microextraction trace analysis methylbutanetricarboxylic acid; atm aerosol iron complex monoterpene complexation vegetation; Biogenic secondary organic aerosol; Dispersive liquid–liquid microextraction; MBTCA; Metal complexes; Trace analysis.
3-Methyl-1,2,3-butanetricarboxylic acid (MBTCA) is a secondary organic aerosol and can be used as a unique emission marker of biogenic emissions of monoterpenes. Seasonal variations and differences in vegetation cover around the world may lead to low atm. MBTCA concentrations, in many cases too low to be measured. Hence, an important tool to quantify the contribution of terrestrial vegetation to the loading of secondary organic aerosol may be compromised. To meet this challenge, a dispersive liquid-liquid microextraction (DLLME) method, known for the extraction of hydrophobic compounds, was extended to the extraction of polar organic compounds like MBTCA without compromising the efficiency of the method. The extraction solvent was fine-tuned using tri-n-octyl phosphine oxide as additive. A multivariate exptl. design was applied for deeper understanding of significant variables and interactions between them. The optimum extraction conditions included 1-octanol with 15% tri-n-octyl phosphine oxide (weight/weight) as extraction solvent, MeOH as dispersive solvent, 25% NaCl dissolved in 5 mL sample (weight/weight) acidified to pH 2 using HNO3, and extraction time of 15 min. A limit of detection of 0.12 pg/m3 in air was achieved. Also, unique complexation behavior of MBTCA with Fe(III) was found when analyzed with ultra-HPLC coupled with electrospray ionization-quadrupole time-of-flight mass spectrometry (UHPLC-ESI-QToF). A comprehensive overview of this complexation behavior of MBTCA was examined with systematically designed experiments This newly discovered behavior of MBTCA will be of interest for further research on organometallic photooxidation chem. of atm. aerosols.
Analytical and Bioanalytical Chemistry published new progress about Aerosols. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.
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