A method of fluorometrically monitoring and optionally controlling the addition of at least one surface additive to a papermaking process, the papermaking process comprising forming a sheet, the sheet having a temperature and a flutter amplitude, the method comprising the following steps: first measuring the fluorescence of a composition prior to the composition being added to the papermaking process, the composition comprising a concentration of the at least one surface additive, the fluorescence corresponding with the concentration of the at least one surface additive in the composition; adding a known amount of the composition to the papermaking process after the forming of the sheet; second measuring the fluorescence of the sheet, the second measuring performed with a fluorometer apparatus, the fluorometer apparatus comprising a fluorometer, a non-contact temperature sensor, and a displacement sensor, the fluorometer comprising a dichroic mirror and at least two fluorescence detectors; third measuring the temperature of the sheet using the non-contact temperature sensor; fourth measuring the flutter amplitude using the displacement sensor; correcting the second measuring for variations in the third measuring and/or the fourth measuring; first correlating the measured fluorescence of the composition with the concentration of the at least one surface additive in the composition; second correlating the corrected measured fluorescence of the sheet with the concentration of the at least one surface additive in the composition; determining a coating thickness of the composition on the sheet using the values obtained from the first correlating and the second correlating; and optionally controlling at least a portion of the papermaking process and/or the addition of the at least one surface additive based on any of the measurements; wherein if the at least one surface additive is incapable of fluorescing, then the composition further comprises an inert fluorescent tracer, the inert fluorescent tracer present in the composition in known proportion with a known amount of the at least one surface additive. first measuring the fluorescence of a composition prior to the composition being added to the papermaking process, the composition comprising a concentration of the at least one surface additive, the fluorescence corresponding with the concentration of the at least one surface additive in the composition; adding a known amount of the composition to the papermaking process after the forming of the sheet; second measuring the fluorescence of the sheet, the second measuring performed with a fluorometer apparatus, the fluorometer apparatus comprising a fluorometer, a non-contact temperature sensor, and a displacement sensor, the fluorometer comprising a dichroic mirror and at least two fluorescence detectors; third measuring the temperature of the sheet using the non-contact temperature sensor; fourth measuring the flutter amplitude using the displacement sensor; correcting the second measuring for variations in the third measuring and/or the fourth measuring; first correlating the measured fluorescence of the composition with the concentration of the at least one surface additive in the composition; second correlating the corrected measured fluorescence of the sheet with the concentration of the at least one surface additive in the composition; determining a coating thickness of the composition on the sheet using the values obtained from the first correlating and the second correlating; and optionally controlling at least a portion of the papermaking process and/or the addition of the at least one surface additive based on any of the measurements; wherein if the at least one surface additive is incapable of fluorescing, then the composition further comprises an inert fluorescent tracer, the inert fluorescent tracer present in the composition in known proportion with a known amount of the at least one surface additive.