Electrochemical Sensors Quiz

What is the principle behind electrochemical sensors?

• Electrochemical sensors measure the temperature of a substance.

• Electrochemical sensors detect the presence of electromagnetic waves.

• Electrochemical sensors rely on mechanical vibrations to detect chemicals.

• Electrochemical sensors convert a chemical reaction into an electrical signal.

What are the two main types of electrochemical sensors?

• galvanic sensors and coulometric sensors

• potentiometric sensors and amperometric sensors

How do electrochemical sensors detect analytes?

• By analyzing the sound waves produced by the analyte.

• By measuring the temperature changes caused by the analyte.

• By using optical sensors to detect changes in light intensity.

• By measuring the electrical current or potential generated during a chemical reaction between the analyte and the sensor's electrode.

What is the role of the working electrode in an electrochemical sensor?

• Facilitates the electrochemical reaction

• Provides a reference potential

• Measures the concentration of analyte

• Generates electrical current

What is the purpose of the reference electrode in an electrochemical sensor?

• To protect the working electrode from corrosion.

• To provide a source of electrical current for the sensor.

• To provide a stable and known potential against which the potential of the working electrode can be measured.

• To measure the concentration of the analyte in the sample.

What is the function of the counter electrode in an electrochemical sensor?

• To measure the concentration of the analyte

• To generate the electrochemical signal

• To complete the circuit and provide a pathway for the flow of electrons

• To prevent the flow of electrons

What are the advantages of using electrochemical sensors?

• Electrochemical sensors have a slow response time and high power consumption.

• Electrochemical sensors have low sensitivity and accuracy.

• Electrochemical sensors are expensive and not cost-effective.

• Electrochemical sensors offer high sensitivity, selectivity, accuracy, fast response time, low power consumption, and can detect a wide range of analytes.

What are some common applications of electrochemical sensors?

• Agricultural monitoring, construction safety, and energy production

• Environmental monitoring, medical diagnostics, industrial process control, and food safety testing

• Water purification, air conditioning, and transportation

• Personal hygiene, entertainment, and telecommunications

What is the working principle of conductometric sensors?

• The working principle of conductometric sensors is based on the measurement of changes in pH due to the interaction of the analyte with the sensing element.

• The working principle of conductometric sensors is based on the measurement of changes in pressure due to the interaction of the analyte with the sensing element.

• The working principle of conductometric sensors is based on the measurement of changes in electrical conductivity due to the interaction of the analyte with the sensing element.

• The working principle of conductometric sensors is based on the measurement of changes in temperature due to the interaction of the analyte with the sensing element.

How do conductometric sensors measure changes in conductivity?

• By measuring the electrical resistance

• By measuring the pressure

• By measuring the temperature

• By measuring the voltage