Changes between Version 38 and Version 39 of TartuSchoolSasView


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Timestamp:
Sep 16, 2018 6:29:32 AM (5 weeks ago)
Author:
ajj
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  • TartuSchoolSasView

    v38 v39  
    1111||   [#section31 3.1 Background Information] || 
    1212||   [#section32 3.2 Calculating Scattering Length Density] || 
    13 ||   [#section33 3.3 Loading and Plotting the data] || 
    14 ||   [#section34 3.4 Fitting the data] || 
     13||   [#section33 3.3 Loading, Plotting, and Examining the data] || 
     14||   [#section34 3.4 Guinier and Kratky Plots] || 
     15||   [#section35 3.5 Fitting the data] || 
    1516|| [#resources Resources] || 
    1617 
     
    234235Physical properties of the DES components: 
    235236||= **Component**       =||= **Chemical Formula** =||=  **Molecular Volume (Å3)**       =||= **Density (g/cm3)** =|| 
    236 ||d9-Choline Chloride|| C5H5D9NOCl      || 210.77 ||1.17|| 
    237 ||d4-Urea||     CD4N2O  ||.75.55 ||     1.41|| 
     237||d9-Choline Chloride|| C5H5D9NOCl      ||  210.77||  1.17|| 
     238||d4-Urea||     CD4N2O  ||   75.55||    1.41|| 
    238239 
    239240 
     
    249250 
    250251Try multiple ways and see if you get the same answer! 
    251 }}} 
    252  
    253  
    254 === [=#section33 3.3 Loading and Plotting the data] === 
     252 
     253Remember that in mixtures, we use the volume fraction of each component to calculate the overall scattering length density: 
     254 
     255[[Image(kemm37_volumefraction_sld.png, 200px)]] 
     256 
     257* The scattering length density of SDS is 0.3x10^-6^ Å^-2^. If you have time, convince yourself that this is the correct value. 
     258 
     259}}} 
     260 
     261=== [=#section33 3.3 Loading, Plotting, and Examining the data] === 
    255262 
    256263You will now load the data into !SasView and make a plot in order to visually inspect the scattering curves. 
     
    293300 
    294301 
    295 === [=#section34 3.4 Fitting the data] === 
    296 {{{ 
    297 #!div style="background: lightblue" 
    298 [=#task15 **TASK 15:**] Fitting the lowest concentration data. 
     302=== [=#section34 3.4 Guiner and Kratky Plots] === 
     303 
     304 
     305{{{ 
     306#!div style="background: lightblue" 
     307[=#task15 **TASK 15:**] Guiner Analysis 
     308 
     309Read the !SasView Documentation here : [http://www.sasview.org/docs/user/sasgui/guiframe/graph_help.html] which describes how to change the plotting scale and make linear fits. 
     310 
     311Select only 7p5hSDS_dChCldUrea_sub.txt in the data explorer and create a new plot of it. 
     312 
     313* Perform a guinier analysis 
     314 * Where is it likely to be linear for this data? 
     315 
     316* If you were to be looking at the lowest concentration data, what type of guinier analysis would you need to do? 
     317}}} 
     318 
     319 
     320{{{ 
     321#!div style="background: lightblue" 
     322[=#task16 **TASK 16:**] Kratky Plot 
     323 
     324Select the lowest concentration data only in the data explorer by ensuring only 0p2hSDS_dChCldUrea_sub.txt has a check mark next to it and create a new plot of that data set. 
     325 
     326* Make a Kratky plot 
     327 
     328Repeat for the 7p5hSDS_dChCldUrea_sub.txt dataset. 
     329 
     330* What do these plots tell you about your data and initial evaluation? 
     331 
     332}}} 
     333 
     334=== [=#section35 3.5 Fitting the data] === 
     335{{{ 
     336#!div style="background: lightblue" 
     337[=#task17 **TASK 17:**] Fitting the lowest concentration data. 
    299338 
    300339Select the lowest concentration data only in the data explorer by ensuring only 0p2hSDS_dChCldUrea_sub.txt has a check mark next to it and click “Send to" fitting. 
     
    312351{{{ 
    313352#!div style="background: lightblue" 
    314 [=#task16 **TASK 16:**] Fitting the other data, starting with the 7.5 wt% data set. 
     353[=#task18 **TASK 18:**] Fitting the other data, starting with the 7.5 wt% data set. 
    315354 
    316355Repeat for other concentrations