Latex Round Robin

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Contents

Samples

A polystyrene latex sample has been used for round robin measurements. As it is fairly monodisperse, it provides good tests for resolution. The hydrogenous polystyrene latex designated PS3 has been prepared in Uppsala (Materials Physics, Uppsala University) by Maja Hellsing.

Three samples at nominal concentrations of 0.4%, 0.1% and 0.025% designated A, B and C have been prepared in D2O with 1 mM added NaCl.

Data Format

Contributors are encouraged to deposit their data using the cansas1d/1.0 XML data standard for 1-D SAS data within a ZIP or gzip archive file. A WWW form (canSAS/xmlWriter) is available to translate three-column ASCII text data into the canSAS1d/1.0 XML format.

Summary Plot


Measurements

At present (30 April 2012) the following instruments have been used for SANS measurements on the latex samples:


D22 at the ILL Grenoble, France

Data measured with a sample-detector distance of 17.6 m and an incident wavelength of 12 Angstrom and 6 Angstrom.

6 A

Sample Run Number Wavelength - 6 A

A, 50488

B, 50489

C, 50490

Solvent, 50491

E. Cell, 50487

Block Beam, 50492


12 A

Sample Run Number Wavelength - 12 A

A, 50506

B, 50507

C, 50508

Solvent, 50509

E. Cell, 50505

Block Beam, 50510

D11 at the ILL Grenoble, France

Data measured with a sample-detector distance of 34 m and an incident wavelength of 13 Angstrom and 6 Angstrom.

Data measured with a sample-detector distance of 8 m and an incident wavelength of 6 Angstrom.

Data measured with a sample-detector distance of 1.2 m and an incident wavelength of 6 Angstrom.


13 A, 34 m

Sample, Run Number Wavelength - 13 A 34 m

A, 33427

B, 33428

Solvent, 33426


6 A, 34 m

Sample Run Number Wavelength - 6 A, 34 m

A, 33418

B, 33419

C, 33420

Solvent, 33417


6 A, 8 m

Sample Run Number Wavelength - 6 A, 8 m

A, 33410

B, 33411

C, 33412

Solvent, 33409


6 A, 1.2 m

Sample Run Number Wavelength - 6 A, 1.2 m

A, 33379

B, 33480

C, 33481

Solvent, 33478


Quokka at ANSTO, Lucas Heights, Australia

Data measured with a sample-detector distance of 20 m and an incident wavelength of 5.08 Angstrom


Sample, Run Number Wavelength - 5.08 A 20 m

A, 37739

C, 37740

Solvent, 37741



SANS2D at ISIS, Didcot U.K.

A sample with nominal concentration 0.5% has been measured with a sample-detector distance of 12 m. (This instrument uses a polychromatic beam in time-of-flight mode.)

Scattering Data

Sample Run Number

0.5%, 10539

Empty Cell, 10571

D2O Solvent, 10514

Transmission Data

Sample Run Number

0.5%, 10498

Empty Cell, 10567

D2O Solvent, 10504

Direct Beam, 10484


Publication

A paper that describes some results of the measurements has been accepted for publication in Journal of Applied Crystallography:

A. R. Rennie, M. S. Hellsing, K. Wood, E. P. Gilbert, L. Porcar, R. Schweins, C. D. Dewhurst, P. Lindner, R. K. Heenan, S. E. Rogers, P. D. Butler, J. R. Krzywon, R. E. Ghosh, A. J. Jackson and M. Malfois 'Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex', Journal of Applied Crystallography, 46, (2013).

It can be found using the doi: 10.1107/S0021889813019468 [1].

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