Methods for analyte detection

A method for selectively detecting concentrations of at least four analytes in a mixture of the analytes, wherein the method comprises the steps of:

• contacting a single sensor with the mixture, wherein the sensor comprises at least one resonant sensor circuit comprising a sensing material that comprises at least two material properties that change at different ratios in the presence of at least four analytes in the mixture;
• and
• generating a multivariate sensor response pattern;
• performing analyte classification;
• and
• performing analyte quantitation and thereby detecting the concentrations of the at least four analytes in the mixture.

A method for selective detection of at least two analytes with one wireless, multivariate, battery-free sensor, the method comprises the steps of:

• contacting at least two analytes with a sensor circuit, wherein the sensor circuit comprises at least one integrated circuit chip that is configured to accept inputs from at least two sensors, where the sensors are positioned in proximity to the chip or are integrated into the chip;
• detecting more than one analyte using at least two inputs into an integrated circuit chip of the sensor circuit where the inputs into the integrated circuit chip are from the same or from different sensing materials;
• determining a multivariate response pattern of the sensor system upon sensor exposure to different analytes by performing a multivariate analysis of the response of at least two sensors;
• and
• identifying the analytes and concentrations of at least two analytes from this pattern, wherein one of the analytes is an analyte of interest to an end-user and the second analyte is an interference or another analyte of interest to the end-user.