Would you please instruct us: The sample on each plate is 100μl(0.1ml) Do we need to multiply the final result with 10 for 1ml sample for this spread plate method ? We use 1 ml sample on each plate for pour plate method but we use 0.1 ml sample on each plate for spread plate method.
Thanks for the excellent video. I have few questions 1. What can we use instead of stomacher bags ? 2. How to prepare sample if we have swab samples or environmental samples ? 3. Formula if we have n3 or n4 also ?
1. Large duran bottle 2. Dissolve the swab stick in 10ml buffer solution. After shaking and vortex, dilute if necessary. Then analyze. 3. First calculate average from 2 plates. In this way, make 2 values from 4 plates.
@@MicroChemsExperiments because according to the FDA-BAM Chp 1 the sample weight stated to be 50g. So I just want to ask did the result for 25g different from 50g?
But in iso method 21527-2 is written: 9.2.3 Incubate the prepared plates aerobically, lids uppermost, in an upright position in the incubator at 25 °C ± 1 °C for 5 d to 7 d. If necessary, leave the agar plates to stand in diffuse daylight for 1 d to 2 d.