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Table 1 Summary of observed Raman bands as a function of solution composition.

From: A Raman spectroscopic study of arsenite and thioarsenite species in aqueous solution at 25 °C

ΣS + ΣAs/mol kg-1

pH

ΣS/ΣAs

Peak positions/cm-1

0.1

13.2

9.0

385

  

5.25

385, 400

  

4.0

400

  

3.17

400, 420, 600, 800

  

1.94

400, 420, 600, 800

  

1.0

400, 420, 600, 800

  

0.52

400, 420, 600, 800

  

0.25

420?, 600, 800

  

0.11

600, 800

0.1

12.6

9.0

385

  

5.25

389

  

4.0

390

  

3.17

391, 600, 800

  

1.94

395, 600, 800

  

1.0

395, 600, 800

  

0.52

396, 600, 800

  

0.25

397, 600, 800

  

0.11

600, 800

0.1

10.5

9.0

385,415

  

5.25

327, 385, 415

  

4.0

331,385,412

  

3.17

332, 384, 413

  

1.94

329, 384, 412, 600, 790

  

1.0

329, 384, 412, 435?, 600, 790

  

0.52

413,435?, 600, 790

  

0.25

435?, 600, 700, 790

  

0.11

600, 700, 790

0.1

8.4–8.5

9.0

328, 385, 419

  

5.25

329, 384, 418

  

4.0

331, 384,413

  

3.17

331, 383,413, 700

  

1.94

332, 382, 414, 701

  

1.0

334, 380, 412, 702

  

0.52

333, 384, 415, 702, 800?

  

0.25

415, ~650sh, 702, 800

  

0.11

~650sh, 702, 800

0.1

6.75

9.0

~340,385,413

 

8.0

4.0

331, 384,413

 

8.1

0.25

350, ~650sh, 702, 800

0.5

12.6

9.0

308, 344, 384

  

4.0

308, 365sh, 389

  

3.17

308, 365sh, 389

  

1.94

308, 365sh,389, 600, 800

  

1.0

308, 365sh,389, 600, 800

  

0.52

308?, 390, 600, 800

  

0.25

370?, 390, 600, 800

  

0.11

600, 800