Waste DVD polycarbonate substrate for screen-printed carbon electrode modified with PVP-stabilized AuNPs for continuous free chlorine detection

被引：2

作者：

Kongkaew, Supatinee ^{[1
,2
,3
]}

Janduang, Santipap ^{[1
,2
,4
]}

Srilikhit, Angkana ^{[1
,2
,4
]}

Kaewnu, Krittapas ^{[1
,3
]}

Thipwimonmas, Yudtapum ^{[1
,3
]}

Cotchim, Suparat ^{[1
,2
,3
]}

Torrarit, Kamonchanok ^{[1
,3
]}

Phua, Cheng Ho ^{[1
,2
,3
]}

Limbut, Warakorn ^{[1
,2
,3
,5
]}

机构：

[1] Prince Songkla Univ, Ctr Excellence Trace Anal & Biosensor, Hat Yai 90110, Songkhla, Thailand

[2] Prince Songkla Univ, Fac Sci, Ctr Excellence Innovat Chem, Hat Yai 90110, Songkhla, Thailand

[3] Prince Songkla Univ, Fac Sci, Div Hlth & Appl Sci, Hat Yai 90110, Songkhla, Thailand

[4] Prince Songkla Univ, Fac Sci, Div Phys Sci, Hat Yai 90110, Songkhla, Thailand

[5] Prince Songkla Univ, Forens Sci Innovat & Serv Ctr, Hat Yai 90110, Songkhla, Thailand

来源：

TALANTA | 2024年 / 277卷

关键词：

Free chlorine; Gold nanoparticles; Waste digital versatile discs substrate; Polyvinyl-pyrrolidone; Lab-made screen-printed electrode; OXIDE-MODIFIED ELECTRODE; ELECTROCHEMICAL DETECTION; SODIUM-HYPOCHLORITE; GOLD NANOPARTICLES; MECHANISM; EXTRACT; WATER;

D O I：

10.1016/j.talanta.2024.126406

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An electrochemical free chlorine sensor was developed by modifying a lab-made screen-printed carbon electrode (SPCE) with gold nanoparticles synthesized with polyvinylpyrrolidone (AuNPs-PVP). The electrode was made by screen printing carbon ink on a waste digital versatile disc (SPC-wDVD). PVP was used to stabilize AuNPs. Scanning electron microscopy showed that AuNPs aggregated without the stabilizer. The electrochemical behavior of the SPC-wDVD was evaluated by comparison with commercial SPCEs from two companies. Electrochemical characterization involved cyclic voltammetry and electrochemical impedance spectroscopy. The detection of free chlorine in water samples was continuous, facilitated by a flow-injection system. In the best condition, the developed sensor exhibited linearity from 0.25 to 3.0 and 3.0 to 500 mg L- 1 . The limit of detection was 0.1 mg L- 1 . The stability of the sensor enabled the detection of free chlorine at least 475 times with an RSD of 3.2 %. The AuNPs-PVP/SPC-wDVD was able to detect free chlorine in drinking water, tap water and swimming pool water. The agreement between the results obtained with the proposed method and the standard spectrophotometric method confirmed the precision of the developed sensor.

引用

页数：9

共 53 条

[1] Swimming pool water disinfection by-products profiles and association patterns [J].