Monitoring and Measurement of Air Pollutants

Chromatography is a laboratory technique used to separate and analyze chemical compounds in a sample. It is not commonly used for sampling air pollutants in the field.

A cyclone is a device used to separate particulate matter from an air stream by centrifugal force. It is commonly used in air sampling to remove particles larger than a certain size, such as PM10 or PM2.5.

Spectrophotometry is a technique that measures the amount of light absorbed by a sample at specific wavelengths. It is commonly used to measure the concentration of sulfur dioxide in air by measuring the absorbance of light at a wavelength of 300 nm.

A nephelometer is an instrument that measures the amount of light scattered by particles in the air. The amount of scattering is proportional to the concentration of particles in the air.

A calibration curve is a graph that relates the instrument response to the known concentration of a pollutant. It is used to convert the instrument response to the concentration of the pollutant in the air sample.

Gas chromatography is a laboratory technique used to separate and analyze chemical compounds in a sample. It is not commonly used for monitoring particulate matter in air.

A filter is a device that removes particulate matter from an air stream by physical means. It is commonly used in air sampling to collect particles for analysis.

Chemiluminescence is a technique that measures the light emitted by a chemical reaction. It is commonly used to measure the concentration of nitrogen oxides in air by measuring the light emitted by the reaction of nitrogen oxides with ozone.

A photoionization detector is an instrument that measures the amount of ionization caused by ultraviolet light. The amount of ionization is proportional to the concentration of ionizable compounds in the air.

A quality assurance/quality control program is a system of procedures and activities designed to ensure the accuracy and precision of data, identify and correct errors, and document the procedures used in an air pollution monitoring program.

Titration is a laboratory technique used to determine the concentration of a chemical compound in a solution. It is not commonly used for monitoring air pollution in the field.

A data logger is a device that records, processes, and transmits data from a monitoring instrument. It is commonly used in air pollution monitoring to collect and store data from the monitoring instrument.

Gas chromatography is a laboratory technique used to separate and analyze chemical compounds in a sample. It is not commonly used for sampling particulate matter in air.

A calibration curve is a graph that relates the instrument response to the known concentration of a pollutant. It is used to convert the instrument response to the concentration of the pollutant in the air sample.

Titration is a laboratory technique used to determine the concentration of a chemical compound in a solution. It is not commonly used for monitoring air pollution in the field.