Method development for analysis of short- and long-chain perfluorinated acids in solid matrices

Method for extraction and analysis of per- and poly-fluoroalkyl substances in contaminated asphalt

“…LC-MS/MS is the most common analytical technique used for the measurement of PFAS in environmental samples. 20,30,32–34 Solid-phase extraction (SPE) is used following extraction for cleanup to remove matrix bias on quantification and preconcentration to improve detection limits. 22,23,30,35–37 Yu et al 37 used a hydrophilic–lipophilic-balanced (HLB) SPE cartridge (Waters) to remove matrix interferences in wastewater and sludge extracts to improve recoveries (PFOS = 92% (wastewater) and 84% (sludge); PFOA = 82% (wastewater) and 70% (sludge)) and quantification limits (PFOS = 0.25 ng L −1 and PFOA = 1 ng L −1 ).…”

Influence of soil properties on the adsorption of short-chain perfluorocarboxylates onto soil

“…土壤被运回实验室后, 在室温下风 干, 用陶瓷研钵碾碎并过2 mm不锈钢筛, 按照已有报 道的方法检测其理化性质 [9] , 结果见表1. 将处理过的 土壤在−20℃下保存, 并在吸附实验前按照Li等 [34,35] 报 道的方法检测其PFCAs本底浓度.…”

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

“…Our sample analysis uses a polymeric weak anion exchange (WAX) retentive phase to thoroughly separate acidic PFAS materials from the traditional organic contaminants while achieving substantial sample concentration factors. This WAX phase is important to capture the short chain perfluorinated acids such as perfluorobutane sulfonate (PFBS) or perfluorinated ethers such as hexafluoropropylene oxide dimer acid (HFPO-DA) which are more polar than the longer chain legacy perfluorinated species 20,21 . As there has been a significant shift towards shorter fluorinated chains and ether inclusion in recent PFAS chemistry Targeted LC-MS/MS quantitation using authenticated standards and stable isotope labeled internal standards provides an unparalleled level of specificity and sensitivity for the quantitative analysis.…”