All reagents used were of
analytical grade unless stated otherwise. Ultrapure water was produced
with a water purification system (EPED-EQ-10T, Nanjing Eped Technology
Development Co., Ltd., Nanjing, China) and used throughout. Silver
nitrate was purchased from Zhujiang Chemical Co., Ltd. (Guangzhou,
China). Sodium chloride, sodium metasilicate nonahydrate, and potassium
chromate were purchased from Tianjin Yongda Chemical Reagent Development
Center (Tianjin, China).
Sodium sulfate anhydrous and lead nitrate
were purchased from Sinopharm Chemical Reagent Co, Ltd. (Shanghai,
China). Sodium carbonate anhydrous,
sodium bromide,
potassium iodide,
sulfuric acid, and
sodium hydroxide were purchased from Xilong Scientific
Co., Ltd. (Shantou, China). Potassium thiocyanate and sodium dihydrogen
phosphate were purchased from Tianjin Damao Chemical Reagent Factory
(Tianjin, China) and Tianjin Zhiyuan Chemical Reagent Co. Ltd. (Tianjin,
China), respectively. A cheap ultraviolet sterilizing lamp of 6 W
(Philips TUV) and portable LED torch (Supfire A5) were purchased from
a local commercial store.
Cai L., Ouyang Z., Song J, & Yang L. (2020). Indicator-Free Argentometric Titration for Distance-Based Detection of Chloride Using Microfluidic Paper-Based Analytical Devices. ACS Omega, 5(30), 18935-18940.