LCGC North America Application Note Alert Having trouble viewing this email? Click here GC Analysis of Sulfur Compounds in Natural Gas This note presents an analysis of sulfur-containing compounds in accordance with ASTM D5504 using gas chromatography with a sulfur chemiluminescence detector.   Ion Chromatography Water, Key to Reproducible Ion Chromatography As scientists demand rapid analyses with smaller sample volumes, ultrapure water plays a key role in maintaining the sensitivity and reproducibility of IC applications.   Sample Prep Pharmaceuticals Determination with HLB-based SPE Disk Thin, dense, and soft HLB-based SPE disks were tested for the analysis of drug compounds such as penicillin, sulfonamides, and tetracyclines in water according to EPA method 1694. Quantitative Analysis of Benzodiazepines in Whole Blood by QuEChERS and LC–MS/MS This application describes an easy, fast, and effective method using QuEChERS for the quantitative analysis of benzodiazepines in whole blood.   GC-MS VOC in Soil by PAL System This application note demonstrated the analytical performance of the Dynamic Headspace Module in the CDS 7000C purge and trap system by EPA Method 8260 in soil sample. SPE Purification of Perfluorinated Compounds (PFCs) A simple, fast method using AttractSPE™ disks for the trace analysis of PFCs in large water volumes, by LC–MS/MS. Improved capacity versions capture smaller PFCs.   MALS Casein Polymerization Characterized by FFF-MALS Asymmetric-flow field-flow fractionation plus static and dynamic light scattering performs gentle separation and characterization of enzymatically cross-linked caseins.   LC HPLC to UHPLC, Example with Polyphenols Here we explain how to transfer an existing HPLC method to a new UHPLC method using polyphenols as an example. Arsenic Speciation on Hamilton PRP-X100 Organic arsenic compounds added to feed stocks of chicken and poultry pose serious environmental and ecological threats.