Centrifugation time Sample Clauses

The 'Centrifugation time' clause defines the specific duration for which a sample must be subjected to centrifugation during a laboratory process. This clause typically outlines the exact number of minutes or hours required, and may specify conditions such as speed (e.g., revolutions per minute) or temperature. By clearly stating the centrifugation time, the clause ensures consistency and reliability in sample preparation, minimizing variability and ensuring that results are reproducible and scientifically valid.
Centrifugation time. Calculate the centrifugation time, tc, necessary to remove particles from solution greater than approximately 0.5 μm (5 × 10¥5 μm) equivalent diameter (which represents all particles except the fine clay fraction) using the following equa- tion: tc(min) = 1.41 × 109 [log(R2/R1)]/N2 where: tc = centrifuge time in minutes R2 = distance from centrifuge spindle to dep- osition surface of centrifuge R1 = distance from spindle to surface of the sample N = number of revolutions of the centrifuge per minute.
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Centrifugation time. Ca lc u l a t e t h e ce n t r ifu g a t io n t i m e, tc, n ecess a ry t o r e m ove p a r t icles f r o m sol u t io n g r e a t e r t h a n a pp r oxi m a t el y 0.5 μm (5×10¥5 μm ) eq u iv a le n t di a m e t e r ( w h ic h r ep r ese n t s a ll p a r t icles excep t t h e fi n e cl a y f r a c t io n) u s i n g t h e fol- lowi n g eq u a t io n: t c( m i n)=1.41×109 [ log( R 2/R1)]/N2 w h e r e: t c=ce n t r ifu ge t i m e i n m i nu t es R2=dis t a n ce f r o m ce n t r ifu ge spi n dle t o depo- s i t io n s urfa ce of ce n t r ifu ge R1=dis t a n ce f r o m spi n dle t o s urfa ce of t h e s a m ple N= nu m be r of r evol u t io n s of t h e ce n t r ifu ge pe r m i nu t e.
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