The detection of monocrotophos, an organophosphate pesticide, which disrupts water bodies and the entire eco‐system has been proposed. The non‐enzymatic organophosphate electrochemical biosensor has been developed with sulphur, nitrogen co‐doped graphene quantum dots (S,N‐GQDSs) nanocatalyst as an interface that mimics the enzyme to activate acetylthiocholine chloride (ATChCl) with significant sensitivity and selectivity. Activation of ATChCl in the absence of enzyme using the S,N‐GQDs interface is the maiden approach accomplished in this work. Activated ATChCl was employed to detect and quantify monocrotophos by reducing phosphoric acid to phosphorous acid during incubation and further to elemental phosphorous. The sensor detects the separation of phosphorus at −131 mV (vs Ag/AgCl) by non‐enzymatic approach coupled with amperometric analysis. The sensor exhibited a limit of detection and a limit of quantification (LOQ) of 25 and 83 nM L⁻¹ respectively.

中文翻译：

---

S，N-GQDs酶模拟电化学传感器可检测水中久效磷的危险水平

已经提出了一种久效磷的检测方法，久效磷是一种有机磷农药，会破坏水体和整个生态系统。非酶有机磷酸酯电化学生物传感器已开发出以硫，氮共掺杂的石墨烯量子点（S，N-GQDSs）纳米催化剂为界面，可模拟酶以显着的灵敏度和选择性激活乙酰硫代胆碱氯化物（ATChCl）。使用S，N-GQDs接口在不存在酶的情况下激活ATChCl是本工作中的首创方法。通过在孵育过程中将磷酸还原为亚磷酸，再还原为元素磷，活化的ATChCl用于检测和定量久效磷。传感器在−131 mV（vsAg / AgCl）结合非酶法和安培分析。该传感器的检测极限和定量极限（LOQ）分别为25和83 nM L ^-1。