Table 2 Detection accuracy and repeatability (Conc.mean/ σconc./ Err.) of the crown ether decorated SiP Pb2+ sensor against analyte pH, using DI water, with reference Pb2+ concentrations of 15 ppb, verified by ICP-MS

From: Crown ether decorated silicon photonics for safeguarding against lead poisoning

Analyte pH (DI water, reference Pb2+ concentration = 15 ppb)

Inferred Conc.mean/ σconc. (n = 6)/ Err.

pH = 5

8.2 ppb/ 0.5 ppb/45.3%

pH = 6

14.7 ppb/ 0.5 ppb/2.0%

pH = 6.8

15.5 ppb/ 0.7 ppb/3.3%

pH = 8

14.8 ppb/ 0.6 ppb/1.3%

  1. Conc.mean refers to mean sensor inferred concentrations. σconc. refers to standard deviation of the sensor-inferred concentrations. Err. refers to the variation in Conc.mean from the reference concentrations. Each analyte pH was measured using six independent photonic sensors (n = 6).
Back to article page