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Sludge retention time = lbs of SS in the system/lbs of SS leaving system

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aeration tank MLSS x volume of aeration tank and secondary clarifier (as million gallons) x 8.34 / WAS TSS conc x WAS flow x 8.34 + Effluent TSS conc x Effluent Flow X 8.34

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How will calculate rrf in hplc?

To calculate relative retention factor (RRF) in HPLC, you need to divide the retention time of the compound of interest by the retention time of the reference compound. The formula is RRF = (Retention time of compound of interest) / (Retention time of reference compound). This value helps in comparison and identification of compounds in the chromatogram.


How to calculate Relative retention time?

Divide the retention time of the peak of ineterest (ex. 14.8 min.) by the retention time of the main peak (ex. 15.9 min.) 14.8/15.9 = 0.93 Therefore your RRT is 0.93 Remember, any peak with an RRT <1 elutes before the main peak, and any peak with an RRT >1 elutes after the main peak! What is RRT & RRF in hplc


What is the retention time formula used in chromatography to calculate the time a compound spends in the stationary phase?

The retention time formula in chromatography is calculated by dividing the time the compound spends in the stationary phase by the time it takes for the mobile phase to travel through the column.


What is the difference between relative retention time and retention time?

Retention time is the time it takes for a compound to travel from the injection point to the detector in chromatography. Relative retention time is the ratio of the retention time of a compound to that of a reference compound in the same chromatographic system. It is used for comparing the behavior of different compounds on the same chromatographic column.


What is the definition of retention time and how does it impact the analysis of chromatographic data?

Retention time in chromatography refers to the time it takes for a compound to travel through the chromatographic column and reach the detector. It is a crucial parameter for identifying and quantifying compounds in a sample. The retention time is unique to each compound and can be used to differentiate between different compounds in a mixture. By comparing the retention times of unknown compounds to those of known standards, scientists can determine the identity of the compounds present in a sample. Additionally, retention time can also be used to calculate the retention factor, which is a measure of how strongly a compound interacts with the stationary phase in the column. Overall, retention time plays a key role in the analysis and interpretation of chromatographic data.


Sludge in engine?

Sludge in an engine is cause by poor maintenance. Air and contaminants build up over time to create a thick sludge throughout the engine.


How do you calculate risk retention?

no of policies renewed/no of potential renewal policies


What does retention time mean?

The retention time represents the time it takes to an analyte to pass from the column inlet to the detector.


What is the Retention factor of caffeine?

it depends on the retention time, void time and reagents that you were used on your chromatograph.


Which great lake has the shortest retention time?

Lake Erie has the shortest retention time of about 2.7 years


Are there any advantages in increasing retention time?

The retention time would increase becasue longer distance would be travelled by the analyte!


Sludge in radiator?

Time to replace the head gasket.