Embodiments of the present invention can be implemented to (i) verify that a liquid within a turbidity measuring device during an assay process is of the same origin of that upon which the assay was performed, (ii) verify a flow through the turbidity measuring device including, but not limited to, a turbidimeter, a nephelometer, a fluorimeter, or the like, and (iii) enact an alteration to measurement step(s) and/or determination step(s) of an assay process in correlation with one or more variables associated with the liquid sample including, but not limited to, flow rate, temperature, and pressure to reduce a standard error of the assay.