Presentation on theme: "Mid-Atlantic Soil Testing & Plant Analysis Work Group"— Presentation transcript:
1Mid-Atlantic Soil Testing & Plant Analysis Work Group Hybrid Gas StreamingSandy Hugheselementar Americas, Inc.
2Elemental Analyzer Technology and Operation Who is Elementar?Hybrid Gas Streaming offerings in 2010Core OperationsCombustionGas separationGas detectionChemistryDetails of the Hybrid Gas Streaming22
3elementar Organization Manufacturing, Research and Developmentelementar Analysensysteme GmbHElemental analyzers (CHNS/O)Located in Hanau, Germany (30 minutes from Frankfurt Airport)R&D, applications and training lab, manufacturing, administrationSubsidiary - Isoprime LtdIsotope Ratio Mass SpectometersLocated near Manchester, U.Kelementar Americas IncSales, Service, Applications & Supplies - USA and Canadaopened in 1998 in Mt. Laurel, NJ (30 minutes from Philadelphia )18 employees33
4elementar Americas Elemental Analyzer Product Line Micro scale CHNS/Ovario MICRO cubevario EL cubeMacro scale CHNS/Ovario Macro cubevario Maxrapid N cube & rapid CS cubeTOCLiquiTOCvario TOC cube44
5Macro N/CN Elemental Analyzers vario MAX CNvario MACRO CN cuberapid N cube55
6Sample Preparation rapid N cube and vario MACRO cube 60 position open carousel- add samples at any time during run- optional 80 or 120 position carouselVariety of foils/capsulesSample Pressing Tool66
8Elemental Analyzer Core Operations CombustionSample combusts in furnace at 950 deg C to 1200 deg CSample drops into crucibleJet injection of oxygen via lance right over/at sampleCreates turbulent flow around samplelike blowing on a fire88
9Elemental Analyzer Core Operations Gas SeparationHelium carrier gas pushes combustion gases through analyzer. Argon is alternate gas.C, H and S combustion gases are trapped in separate columns, then sequentially released (aka “purge and trap”).N2 gas is not trapped. It flows straight thru columns.99
10Elemental Analyzer Core Operations Gas DetectionTCD – Thermal Conductivity Detector. Combustion gases and reference gas have different thermal conductivities.R3 and R4 are thermistors (resistors whose resistance changes with temperature).TCD creates voltage signal which is integrated over time and calibrated to elemental mass.The voltage signal is created as follows:Electric current in R3 and R4 thermisters increases their temperatures relative to TCD metal mass surrounding path of gas flow.R3 thermister is cooled by thermal conductivity of column gas. R4 thermister is cooled by thermal conductivity of reference gas.R3 vs R4 temperature difference creates difference in thermister resistance which creates voltage signal.1010
12Elemental Analyzer More Chemistry Removal of other gasesX- via reaction with silver woolH2O via condensation, membrane dryer and SicapentTr S02 via reaction with tungstenNitrogendetected by TCDCarbon Dioxiderapid N – “fades” into carrier gasMax and Macro – separated on purge and trap column, then released and detected by TCD.1212
13Continuous Flow Hybrid Gas Streaming Technology This option enables elementar CN and N analyzers to stream only a portion of the combustion gases to the reduction tube for reduction and subsequent detection. The reduction tube accordingly has a longer life.POSTCOMBREDUCTIONCOMBGSStream to Reduction ColumnTo Exhaust
14Continuous Flow Hybrid Gas Streaming Features and Benefits Operator controlOperator turns on gas streaming and defines the streaming ratioUser can optimize analyzer performance for customer’s mix of samplesTurn off gas streaming for very small samples or low concentrationsTurn on gas streaming for long runs of larger samplesContinuous ProcessThe gas steaming process uses a mass flow controller. There is no ballast tank and no aliquot loop.Maintenance is very low.Reduction tube life is extendedUp to three times longer life for reduction tube.Depends on streaming ratioLower Consumables cost.Fast payback – depends on samples per day, see attached.Longer runs. Less downtime.