| gc7890ii is a multi-function gas chromatography developed on the basis of gc7890i. it has the basic features of compact structure, automation, precise temperature control, plus the following add-on functions · improved temperature control of column oven. imported impeller resolve the problem of dynamic balance ensure even temperature distribution, resulted in high repeatability. · five detectors are available: fid, tcd, ecd, fpd and npd. any two of them can be mounted at the same time. · with techcomp specialised gc software; single column temperature compensation. more stable baseline and measurement results are more accurate. · wide range of injector choice from packing injector, capillary injector to split/ splitless capillary injector and so on. split/ splitless injector can eliminate tailing and ghost peak. · with new detector design, sensitivity and linearity can be enhanced. · according to international safety standard, gc7890ii software enhances protection functions on preventing from excessive power supply and sudden power break. · automation and reliability have been improved with using programmable fpga logic chip. · the parameter set up can be stored for ten years with eprom · gc7890ii has analog signal output interface and rs232 interface, with which the user can se-lect various integrators and pc software to process data. specification of detector · flame ion detector (fid) sensitivity: mt=1×10-11g/s noise: =1×10-14 a linear range: =105 max. temp: 399°c · thermal conductor detector (tcd) sensitivity: s=2500mv.ml/mg noise: =20uv linear range: =104 max. temp: 399°c · electron capture detector (ecd) sensitivity: mt=1×10-13g/s (bhc) noise: =15uv linear range: =5×103 max. temp: 350°c (ni63) · nitrogen phosphorus detector (npd) sensitivity: n: mt=5×10-11g/s p: mt=5×10-12g/s noise: =2×10-13 a · flame photometric detector (fpd) sensitivity: n: s=3×10-10g/s p: mt=5×10-11g/s noise: =20~30uv |
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