Recent advances in electrochemical monitoring for the detection of the chemical oilfield tracer carmine

, and a low limit of detection of 0.017 μM (S/N = 3). In real oilfield water samples, the recovery rate was 99.4% and 103.2%, showing excellent reproducibility, stability, and selectivity against common interfering ions. These findings highlight the potential of CTPSI-PC-based electrochemical sensors as efficient and reliable tools for quantitative detection of oilfield tracers, and lays a foundation for practical applications in oilfield monitoring.