Aiming at the requirement of chloride ion concentration detection in liquid/gas phase environment

a funnel-shaped chloride ion concentration detection method based on two-electrode detection system is proposed.By designing a funnel-type collection unit

effective acquisition of gas phase environmental samples is achieved.According to the output potential difference of the sensor

the chloride ion concentration in the sediment of the collection unit is calculated.A 3 D printing technique is used to make a polytetrafluoroethylene shell

and an Ag/AgCl electrode is prepared by electroplating.Under th

e liquid phase condition of 1×10

-3

～1 mol/L sodium chloride concentration range

the linearity of the calibration curve is about 99.14 %

the sensitivity reaches 54.63 mV/lgC

Cl

-

and the lower detection limit is 0.891×10

-4

mol/L.Good sensitivity and detection interval.In a gas phase environment with a settling rate of 100 mL/（80 cm~2 · h）

the peak response time of the sensor based on the funnel-type collection unit is about 440 s

but there is no valid data without the funnel-type collection unit design.