The proximity of the agreement or disagreement between these results is discussed in this paper. As a result, the BIPM defines accuracy as the match between the indications or values measured, obtained by replication of measurements on the same or similar objects under specific conditions . Precision may include accuracy in its broader definition, but the two words are not strictly interchangeable. Good agreement and proximity to predicted and experimental results and high dye adsorption capacity in a short period of time confirm the high ability of the current wastewater treatment method, while a simple separation of existing nanoparticles and good regeneration support a good applicability of Fe3O4-MNPs-AC for wastewater treatment. When measuring a set, accuracy is the proximity of the measurements to a given value, while accuracy is the proximity of the measurements. On the other hand, the International Bureau of Weights and Measures (BIPM) defines accuracy as the proximity of the agreement between a measured value and a real value of a measured value (quantity to be measured) . In this case, veracity is defined as the match between the average of an infinite number of replicated measurement values and a reference value. Accordingly, the New Oxford American Dictionary indicates that the technical definition of accuracy is the degree to which the result of a measurement, calculation or specification corresponds to the correct value or standard . In the same line, the Merriam-Webster dictionary defines accuracy as the degree to which an identification number conforms to a standard or actual value . In accordance with ISO 5725-1, the general term «precision» is used to describe the proximity of a measurement to the actual value. When the term is applied to series of measurements of the same measurement, it is a component of random errors and a component of systematic errors. In this case, the veracity is the proximity of the average of a set of measurement results to the actual value and the accuracy is the agreement between a number of results.
In the fields of science and technology, the accuracy of a measurement system is the degree of proximity of measurements from a quantity to the actual value of that quantity.  The accuracy of a measurement system that relates to reproducibility and repeatability is the degree to which repeated measurements under unchanged conditions show the same results.   Although the two words are commonly synonymous with precision and precision, they are deliberately contrasted in the context of the scientific method.