portble UV-Vis spectrometer for gemstone nlysis: bsorption trnsmission luminescence Developed by the Physics Deprtment of the University Bsel nd the SSEF Swiss Gemmologicl Institute. min fetures: - Very light nd highly sensitive spectrometer - Lrge spectrl rnge (290-1100 nm) - Very fst scnning time for spectrum (few seconds) - Esy smple hndling - Plug-nd-ply with USB 2.0 in your PC or lptop 2.0 Spphires from different origins SSEF mobile UV-Vis-NIR spectrometer 560 nm (Fe2+ - Ti4+ IVCT) - Lrge spectrl dtbse of gemstones included (spectropro) - AvsoftBsic progrm included Absorption 1.5 1.0 450 nm (Fe3+) pprox. 890 nm (Fe2+ - Fe3+ IVCT) - Protected in sfety box 0.5 - Truly portble! All components fit in shoe-box 0.0 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 Wvelength (nm) pge 1
Absorption nd trnsmission spectrometry: - UV trnsprent light diffuser for ensures the best smple illumintion - Visible (hlogen) nd UV light (LEDs) cn be switched on/off sepertely - A number of plstic rings s smple holder to prevent stry light - UV solriztion resistnt fiber - Adjustble signl/noise rtio of spectr (smoothing, verging) - Red wrning light when bulb is broken - Tools included for esy bulb replcement - Step-by-step mnul how to use the instrument Usully, recording smple spectrum tkes bout 1-20 seconds. How cn you use it for gemstone nlysis? - Detection of copper in blue tourmline (Prib-type or not?) - Distinguish Fe-bering rubies from Fe-free rubies (e.g. from Burm) - Distinguish Fe-bering emerlds from Fe-free emerlds (e.g. from Colombi) - Detection of green dye in jdeite - Detection of chromium in green jdeite - Indiction of origin of spphires - Dimond spectrum (e.g. Cpe I dimonds...) - etc... high iron in emerld from Zmbi (Est-Afric) low iron in emerld from Colombi Absorption 2.0 1.5 1.0 Presence of copper nd mngnese in tourmlines 530 nm (Mn) 710 nm (Cu) purple greenish blue Prib yellowish green light green Prib light blue tourmline (no copper!) 920 nm (Cu) copper in Prib-type blue tourmlines! 0.5 720 nm (Fe) no copper in light blue tourmline! 0.0 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 Wvelength (nm) pge 2
Luminescence spectrometry: - Metl ring with three monochromtic UV-LEDs (365 nm) - Drk bckground subtrcted from signl to increse signl/noise rtio Usully, recording luminescence spectrum tkes bout 1-100 seconds, depending on the strength of the signl. How cn you use it for gemstone nlysis? - Distinguish nturl nd flux synthetic red spinel - Anlyse dimond luminescence - Anlyse fluorescent fissure fillings, e.g. polymer treted jdeite (B-Jde) - Register chromium in spphires below XRF detection limits - etc... Luminescence spectr of red spinel (nturl nd flux grown synthetic) luminescence (emission) 16000 14000 12000 10000 8000 6000 Luminescence spectrum (excittion 365 nm LED) nturl red spinel flux synthetic red spinel 685 nm 687 nm flux synthetic flux-melt grown synthetic spinel shows distinct pek shift nd much less pronounced PL peks 4000 nturl 2000 nturl flux melt synthetic 0 600 620 640 660 680 700 720 740 760 wvelength (nm) Luminescence spectrum of HPHT treted dimond (type I) 4000 3000 527 nm Luminescence spectrum (excittion 365 nm LED) dimond I HPHT luminescence (emission) 2000 1000 LED excittion 365 nm 439 nm 429 nm 452 nm 463 nm 415 nm 0 300 350 400 450 500 550 600 650 700 750 800 wvelength (nm) pge 3
Specifictions: Spectrometer: Avntes AvSpec-2048 Fiber Optic Spectrometer bsed on the AvBench-75 symmetricl Czerny-Turner design with 2048 pixel CCD Detector Arry. The spectrometer hs fiber optic entrnce connector, collimting nd focusing mirror nd diffrctionl grting enbles pplictions in the 200-1100nm rnge. The AvSpec-2048 comes with USB2.0 interfce with 16 bit AD converter nd ultrfst dtsmpling of 900 spectr per second nd dttrnsfer in 1.8msec. The AvSpec-2048 is especilly suitble for low light level nd high resolution pplictions. An optionl detector coting enhnces the CCD performnce for the UV rnge nd detector collection lens offers high sensitivity. Technicl Dt: Spectrometer pltform AvSpec-2048-USB2 Opticl Bench Symmetricl Czerny-Turner, 75 mm focl length Wvelength rnge 200-1100 nm Resolution 0.6 nm, depending on configurtion Stry light < 0.1% Sensitivity 20,000 (16-bit A/D) in counts/µw per ms integrtion time Detector CCD liner rry, 2048 pixels >150 nm Deep UV detector coting Detector collection lens to enhnce sensitivity, Qurtz, 200-1100 nm Slit size 25 µm Signl/Noise 200:1 AD converter 16 bit, 2 MHz Integrtion time 1.11 ms - 10 min. Interfce USB 2.0 high speed, 480 Mbps, RS-232, 115.200 bps Smple speed 1.1 msec /scn with on-bord verging Dt trnsfer speed 1.8 msec /scn Power supply Defult USB power, 350 ma Lmp sources: - Vis: Hlogen lmp - UV: series of 6 LED s 300, 310, 320, 330, 340, 365 nm - Three UV LED s 365 nm for luminescence spectr Smple chmber: - Aluminium tube (two prts) with djustble perture (depending on smple size) - Protection cover ginst surrounding stry light - Light diffuser: UV trnsprent qurtz plte Softwre: - AvsoftBsic with mnul Dimensions, weight c. 400 x 300 x 150 mm, 4.7 kg (dimensions & totl weight when stored in protection box) the single components re much smller nd much lighter! pge 4
Pckge: - High resolution spectrometer (200-1100 nm) - Smple chmber - Fiber optic cble - Light controller (trnsmission/luminescence) - UV trnsprent light diffuser - Additionl smple holder (plstic rings) - Avsoft softwre - USB 2.0 cble - Electricl dpter - System opertion mnul - Spre bulbs - Bulb exchnging tools - Protection box Only for SSEF Spectro Pro: - Lrge spectrl dtbse of gemstones - Lptop (windows OS) - Softwre pre-instlltion (redy-to-go nd plug-nd-ply) - Metllic trolley with wheels for esy trvelling (only for SSEF Spectro Pro) Pricing (VAT nd shipping not included): SSEF portble Spectro PRO SSEF portble Spectro 30 000.- Swiss Frncs 24 000.- Swiss Frncs SSEF provides lso one dy trining for the instrument t SSEF lbortory or in your premises (not included in bove prices. If interested, plese sk for quote) For enquiries, plese contct: SSEF Swiss Gemmologicl Institut Flknerstrsse 9 CH-4001 Bsel Switzerlnd tel. +41 (0)61 262 06 40 fx. +41 (0)61 262 06 41 emil: gemlb@ssef.ch website: www.ssef.ch pge 5