Accuracy Improvement for the Biochemistry Assays by Using Total Dissolved Solids and Turbidimetry Measurements

Biochemistry is one of the most important blood assays science that is responsible with the study of the chemical reactions that take place in the living organisms. The evaluation of the processes is performed by analyzing a sample on a biochemistry instrument that uses liquid or solid reagents, triggering a colorimetric reaction direct proportional with the concentration of the sampled substance. In order to ensure the precise and accurate results on the biochemistry analyzer, its external interference factors must be reduced as much as possible. If the temperature is constant, the mechanical clearance is not present, the reagents are stored and used in proper conditions, the photometer has no dust layer over the lens, the measurement errors can be only induced by the poor quality of the water involved in the pipetting and sampling processes. To verify this fact, this paper presents a prototype of total dissolved solids (TDS) and turbidity meter which analyzes the quality of the water before the sampling procedure. Based on the values obtained for the water, the calibration line can be compensated in order to obtain precise and accurate results.