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1. |
A water sample is analyzed for coliform organisms by the multiple - the fermentation method. The results of the confirmed test are as follows:Sample size (mL)Number of positive results out of 5 tubesNumber of negative results out of 5 tubes0.01500.001320.000114The most probable number (MPN) of coliform organisms for the above results is to be obtained using the following MPN Index.MPN Index for Various Combinations of Positive Results when Five Tubes used per Dilution of 10.0 mL, 1.0 mL, and 0.1 mLCombination of positive tubesMPN Index per 100 mL0 – 2 – 4111 – 3 – 5194 – 2 – 0225 – 3 – 1110The MPN of coliform organisms per 100 mL is |
A. | 110000 |
B. | 1100000 |
C. | 110 |
D. | 1100 |
Answer» B. 1100000 | |