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Instruments

Instrument Description Location Cost (UW internal) Contact information Vendor link
Quantachrome Autosorb-1
Quantachrome Autosorb-1
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The Quantachrome Autosorb-1 instrument is used for BET and Langmuir surface area, isotherms, pore size and surface area distributions, micropore volume and surface area. The Autosorb-1 can quantify the above mentioned parameters by dosing or removing a known quantity of nitrogen gas in a sample cell that contains the solid adsorbent which is maintained at the critical temperature of the nitrogen gas. By recording relative pressures changes as the gas is added or removed an isotherm is created. WSEL Room 202 $45.84/sample Chris Worley, caworley@wisc.edu, 608.262.2899 Autosorb-1 Series
Shimadzu TOC-V CSH and TNM-1
Shimadzu TOC-V CSH and TNM-1
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The Shimadzu TOC-TN instrument is capable of measuring total organic carbon, total carbon and inorganic carbon by utilizing a non-dispersive infrared (NDIR) gas analyzer and total nitrogen (TN) using a chemiluminescence detector (Note: currently do not have a TN cost calculated). Total carbon (TC) is analyzed by introducing the sample into the combustion tube heated to approximately 700 degrees C. A platinum catalyst in the combustion tube converts all carbon to CO2 and is then swept to the NDIR detector and quantified. Inorganic carbon (IC) is analyzed by adding a small amount of hydrochloric acid (during analysis) to obtain a pH of less than 3. This converts all carbonates to CO2 and is volatilized by bubbling air or nitrogen (that does not contain CO2) through the sample. Total organic carbon (TOC) is commonly determined by two methods. The first is by subtracting the IC from the TC. What is left is the organic carbon. The second is the non-purgable organic carbon (NPOC) method. During analysis the sample is acidified to a pH of 2 or 3 and then sparged with carbon free gas. This eliminates the IC. The remaining carbon is referred to as TOC. WSEL Room 108A $2.97/sample Chris Worley, caworley@wisc.edu, 608.262.2899 TOC Analyzers
Perkin Elmer 4300
Perkin Elmer 4300
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Perkin Elmer 4300 Dual View Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES). Used for elemental analysis. Samples are introduced into the plasma via a nebulizer/spray chamber. Each elemental atom is excited to a higher energy state and then returns to a low energy state. When atoms fall back to ground state their emission rays from the corresponding photon wavelength are measured. Multiple elements can be measured at the same time (simultaneous detection). Detection limits typically are in the very low part per million to part per billion concentration. WSEL Room 128 $31.00/hour (typically 20 samples can be analyzed in 1 hour) Chris Worley, caworley@wisc.edu, 608.262.2899 PerkinElmer
Solartron SI 1287
Solartron SI 1287 Potentiostat with light source
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The potentiostat Solartron SI 1287 can characterize samples by electrochemical methods, such as LSV (linear sweep voltammetry), CV (cyclic voltammetry) and CA (chronoamperometry). With an impedance/gain-phase analyzer Solartron SI 1260, EIS (electrochemical impedance spectroscopy) is employed to determine resistances of samples. These methods are useful for characterizing electrochemical properties of samples and testing batteries, capacitors, and fuel cells. Using the light source (500 W Hg (Xe) arc lamp, Oriel 66142 or halogen lamp), the photo-electrochemical properties of samples (for photo-electro catalyst and solar cells) are also characterized with the electrochemical methods described above. In addition, ICPE (incident photon to current conversion efficiency), also called EQE (external quantum efficiency), will be obtained using a monochromator Oriel Cornerstone 74000. WSEL Room 121 $20/hr for potentiostat only. $25/hr for potentiostat and light source. Chris Worley, caworley@wisc.edu, 608.262.2899 Solartron Analytical
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