According to Indian standards, the dispersing solution used in pipette method, for the determination of size of particle consists of

- 1
  
  7 g sodium carbonate, 43 g sodium hexameta-phosphate and 1 litre distilled water
- 2
  
  7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water
- 3
  
  7 g sodium carbonate, 23 g sodium hexameta-phosphate and 1 litre distilled water
- 4
  
  any one of the above

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