Biomarker analysis often requires sample normalization to resolve indirect variability associated with analytes. Aqueous samples, like urine, have inconsistent dilution profiles, impacting the accuracy of biomarker measurement. Normalization provides a baseline measurement to correct for sample volume discrepancies or other sources of variability. Arbor Assays makes a variety of innovative normalization assays. Our creatinine and hemoglobin assays are ideal for routine normalization of biomarker measurements in urine and serum samples.