Log CFU mL Log10 CFU dilution factoraliquot Log102510 - 2 1 340. Then the number of bacteria in 1 ml of. Yes you can calculate using the formula cfuml no.
Using one of our test results as a working example Enduro Hand Sanitiser was tested according to EN 13697 against Escherichia coli using a contact test time of 3 minutesThe control of bacteria was given as 402 x 10 6 4020000 CFUs.
Hence you need calibration curves for CFUml at each cellsml value and cellsml at each OD value. Of colonies x dilution factor volume of culture plate. NOT a ln button Then as per calculator manual for using log function enter X and click log sometimes the reverse follow the manual. As long as your data points fall within the linear or loglinear parts of the calibration curves.