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International Starch Institute
Science Park Aarhus, Denmark
ISI 33-2e Determination of Baumé of Starch Slurry by Centrifugation
| 1. Scope | The method is applicable to starch slurry
|
LT 15 Jan 1998 |
| 2. Principle | Volume of starch sediment after centrifugation is interpreted as
concentration of slurry
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| 3. Apparatus | 3.1 Centrifuge with free swinging rotor, manual or electrically powered | |
| 3.2 Centrifuge tube 15 ml with 0.1 ml marks 0-10 ml and mark at 15 ml
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| 4. Procedure | Fill tube (3.2) with 15.0 ml starch slurry. | |
| Spin in centrifuge until all starch has settled. | remember counter weight | |
| Read sediment in ml (V) to the nearest 0.1 ml
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| 5. Calculation | Report starch concentration of slurry with one decimal in degree Baumé
(Béo) = fV
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Use factor f = 2 for potato starch. Determine factor f for other starches empirically. |
| 6. Note | The centrifuge is superior to the aerometer as a process tool being indifferent to entrapped air and rapid settling starch. | |
| With Baumé as entry table values of density etc may be found | ISI Starch Slurry Viscosity Table |
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Keywords: laboratory method determination concentration Baumé starch slurry milk centrifugation centrifuge