Moving tapes

Successful combination of a chromatographic procedure for separating and isolating additive components with an on-line method for obtaining the IR spectrum enables detailed compositional and structural information to be obtained in a relatively short time frame, as shown in the case of additives in PP [501], and of a plasticiser (DEHP) and an aromatic phenyl phosphate flame retardant in a PVC fabric [502], RPLC-TSP-FTIR with diffuse reflectance detection has been used for dye analysis [512], The HPLC-separated components were deposited as a series of concentrated spots on a moving tape. HPLC-TSP-FTIR has analysed polystyrene samples [513,514], The LC Transform has also been employed for the identification of a stain in carpet yarn [515] and a contaminant in a multiwire cable [516], HPLC-FTIR can be used to maintain consistency of raw materials or to characterise a performance difference. 

Playback head— A small coil that senses the varying magnetic field of the moving tape and converts it into an electrical signal that can be amplified. 

An international group (Gaggeler et al., 1992 Tiirler, 1992) used OLGA II and 35-s 262Db to perform the first online isothermal gas chromatography of the bromides of element 105. The volatile species were deposited on a moving tape and transported in front of six large area passivated implanted planar Si detectors for measurement of a-particles and SFs. The adsorption enthalpies were nearly... 

To measure the decay of the separated species, they are - after leaving the chromatographic column and entering a water-cooled recluster chamber - attached to new aerosols and transported through a capillary to a detection system, a rotating wheel or a moving tape system (Tiirler 1996) that positions the deposited activity in front of successive PIPS detectors (Passivated Ion-implanted Planar Silicon), which register a particles and SF events. The... 

The U.S. military has also used similar enzyme detection techniques, but does not depend on moving tape for CWA detection, which was known as the real-time monitor in the 1970s. This is another example of how colorimetric detectors can be used in CWA detection. The system was developed for safety monitoring of... 

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