Part No: AN051-HORIssued year: 2009File size: 0.65mbFile type: pdf
The DryDisk® Separation Membrane was designed to replace conventional sodium sulfate in the drying of sample extracts. The DryDisk® is a hydrophobic membrane, consisting of a GORETEX ® process filtration media based on polytetrafluroethylene (PTFE). The hydrophobic property of the membrane allows the extracting solvent to pass through it, while retaining any water in the sample extract on the membrane’s surface.
Part No: AN052-HORIssued year: 2009File size: 0.72mbFile type: pdf
Effective removal of residual water from organic solvents is critical to achieve optimal recoveries for water soluble compounds. Sodium sulfate has been the standard technique for removing residual water from solvent extracts for many years; however, it has several major drawbacks. Water soluble analytes in the residual water phase can become adsorbed in the sodium sulfate, leading to lower recoveries.
Part No: AN009-HOR.V.1Issued year: 2015File size: 0.58mbFile type: pdf
Method 525.2 describes the procedure to determine a full suite of low concentration semi-volatile organic compounds in drinking water using solid phase extraction (SPE) or liquid–solid extraction (LSE) techniques. The City of Fort Worth, Water Department implemented an automated SPE process for the analysis of semi-volatiles by EPA Method 525.2 using the Atlantic® C18 solid phase extraction disk. Ethyl acetate, methanol and water were used to condition the Atlantic C18 disk prior to the extraction step. The extraction solvents used were a 1:1 mixture of methylene chloride and ethyl acetate. Extracts were then analyzed by GC/MS using a splitless injection technique.
Part No: AN101-HORIssued year: 2016File size: 1.07mbFile type: pdf
This application note highlights a SPE disk which was specifically designed to increase the recoveries of traditionally difficult polar compounds as well as help to increase the diversity of the traditional 525.2 list to include those compounds which are of concern in today’s society.