SIGMA Z226661

Polyetheretherketone (PEEK) tubing has become a popular replacement for stainless steel tubing in various places in the HPLC system. It is especially useful when contact between the sample and metal components must be avoided, such as when working with metal complexing agents or certain biochemical compounds. PEEK tubing also offers other advantages: it is flexible, easy to cut, has excellent mechanical stability and chemical compatibility, and can be used to 100 °C. Tetrahydrofuran (THF), dimethyl sulfoxide (DMSO), methylene chloride, and concentrated nitric and sulfuric acids should not be used with PEEK tubing. Our 1/16 in. PEEK tubing is color coded for easy identification of the internal diameter. 10 ft./3 m length. Polyetheretherketone (PEEK) connecting tubing may be used as a solvent holder and as the fluid delivery duct while being immersed in a continuously flowing sample solution, in a liquid-liquid microextraction method termed as continuous-flow microextraction (CFME) for dilute analytes. It may also be used in a flow through cell, in experiments performed to measure the solubility of zinc oxide from 150 to 300°C.