Fer smbt
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This document describes the 6890 Flame Photometric Detector. It discusses the components and installation of the single and dual FPD options. It also covers the theory of flame photometry for detecting sulfur and phosphorus, including the use of filters and photo-multiplier tubes. Application examples are provided for petroleum, environmental, and food and flavor analyses. Specifications for the 6890 FPD and comparisons to other GC detector models are included.
Fer smbt
- 1. 6890 Flame Photometric Detector Introduction and Theory August8, 2003
- 2. 6890 FPD - Top Level Assembly Vent Tube Back DET Temp Heater Photo-Multiplier Tube (PMT) AUX 2 Temp Heater 6890 F PD Agile nt R e s tricte d Page 2 Ju ne 1 9, 2003
- 3. 6890 FPD Installation Vent Tube Photo-Multiplier Tube (PMT) Signal Connection Back DET Temp AUX 2 Temp Heater Connection Heater Connection High Voltage Connection Ignitor Connection 6890 F PD Agile nt R e s tricte d Page 3 Ju ne 1 9, 2003
- 4. 6890 FLAME PHOTOMETRIC DETECTOR F la m e P h o t o m e t r ic Product No. : G2333A/G2334A or HP 6890 option 240/241 Single and Dual Signal options. EPC Only. Same design as the 5890 FPD . (Most part numbers the same) Phosphorus and Sulfur filters available. 6890 F PD Agile nt R e s tricte d Page 4 Ju ne 1 9, 2003
- 5. 6890 FLAME PHOTOMETRIC DETECTOR Installation: Can be retrofitted on older instruments but may require top cover modification. PMT mounted left to right Single FPD - Fitted in back position (ease of access to front) Dual FPD - Fitted in back : Uses both detector PCB slots : Cannot use ALS in back position. Uses both DETB and AUX2 heated zones to heat transfer line and heated block, but only DET temp entered. Requires AUX actuator solenoid bracket and wiring harness. Requires 2.1x 6890 firmware and 4.02 Chemstation (single) 3.0x 6890 firmware and 5.01 Chemstation (dual) 6890 F PD Agile nt R e s tricte d Page 5 Ju ne 1 9, 2003
- 6. 6890 FLAME PHOTOMETRIC DETECTOR F lame Photometric Both heat ers are rated 60W, 40VDC Heater/S ensor connect ed to Detector wiring harness Heat er/S ensor connected to A ux wiring harness 6890 F PD Agile nt R e s tricte d Page 6 Ju ne 1 9, 2003
- 7. 6890 FLAME PHOTOMETRIC DETECTOR Dual Wavelength option Phosphorus Sulfur Filter Filter PMT 1 PMT 2 Jet Air/H2 Lines 6890 F PD Agile nt R e s tricte d Page 7 Ju ne 1 9, 2003
- 8. 6890 FLAME PHOTOMETRIC DETECTOR Dual Wavelength option 6890 F PD Agile nt R e s tricte d Page 8 Ju ne 1 9, 2003
- 9. 6890 FLAME PHOTOMETRIC DETECTOR 6890 F PD Agile nt R e s tricte d Page 9 Ju ne 1 9, 2003
- 10. 6890 FLAME PHOTOMETRIC DETECTOR Chemiluminescence zone 1st Heat Shield CH3 - S - CH3 + X2 = Products + hv (light) X2 is the oxidising reagent gas. h is Planck's constant. v is the lights frequency. 6890 F PD Agile nt R e s tricte d P age 1 0 Ju ne 1 9, 2003
- 11. 6890 FLAME PHOTOMETRIC DETECTOR S2 0.5 0 0.5 HPO Relative Spectral 0 Response CH C2 0.5 0 0.5 Element Wavelength Colour S F ilter P F ilter 0 (nm) 300 400 500 600 Sulphur 393 blue/purple Wavelength (nm) Phosphorus 525 yellow/green 6890 F PD Agile nt R e s tricte d P age 1 1 Ju ne 1 9, 2003
- 12. 6890 FLAME PHOTOMETRIC DETECTOR Photo Multiplier Tube Theory Photo-emissive Photo-electron Dynodes Secondary electrons Cathode Anode/Collector e- 106 DC Voltage e- Photon of Light Signal out to electrometer 850 VDC Electron Multiplication by the Dynodes Typical Gain 100,000 - 1,000,000 1 30 90 2500 7500 67500 3 10 270 810 22500 200000 6890 F PD Agile nt R e s tricte d P age 1 2 Ju ne 1 9, 2003
- 13. 6890 FLAME PHOTOMETRIC DETECTOR Uses Primary - Petroleum & Petrochemical Sulphur in process streams, fuels & oil products Secondary Environmental Pesticides - sulphur, phosphorus, tin compounds Flavors & Fragrances Beverages - sulphur containing compounds 6890 F PD Agile nt R e s tricte d P age 1 3 Ju ne 1 9, 2003
- 14. 6890 FLAME PHOTOMETRIC DETECTOR 150 pA 2000 1-2 ppm organophosphate Conditions 1500 pesticides Column: 30m x 250um HP5MS, 2 ml/min constant flow 1000 Oven program: 60C 500 0 for 2 minutes then 15C/min to 300C, 11 12 13 14 15 16 17 18 min 60 20-40 ppb organophosphate hold for 2 min 50 pesticides FPD: 150 ml/min H2, 40 100 ml/min air, and 30 30 ml/min N2 makeup, 20 250C and data 11 12 13 14 15 16 17 18 min collected at 20 Hz Inlet: COC run in oven track mode 1 ul injected. 6890 F PD Agile nt R e s tricte d P age 1 4 Ju ne 1 9, 2003
- 15. 6890 FLAME PHOTOMETRIC DETECTOR Varian PE Shimadzu Fisons O.I. HP Agilent 3400 9000XL GC 17A 8000 5380 5890 6890 S MDL pg/sec <100 10 20 5 1 20 20 Dynamic Range 10^3 10^2 10^3 10^3 10^3 10^3 10^3 S/C Selectivity 10^3/^6 10^4 10^5 10^5 10^6 10^5 10^5 P MDL pg/sec <1 1 0.9 0.2 0.1 0.9 0.9 Dynamic Range 10^5 10^3 10^4 10^4 10^4 10^4 10^4 S/C Selectivity 10^5? 10^5 10^6 10^6 10^5 10^6 10^6 Upper temp limit 400 450 450 350 420 300 250 Unique features Dual PPC Dual PMT Pulsed Dual EPC Flame H2 / air FPD PMT Also EPC HP GC one or PFPD two FPDs Dual PMT Price $11,595 $7245 $7400 6890 F PD Agile nt R e s tricte d P age 1 5 Ju ne 1 9, 2003