Air quality monitoring
We have the capability to measure PM mass and number in outdoor and indoor locations.
Measuring particle mass
We have a number of different pieces for equipment designed to measure PM2.5, PM10 and further subdivided mass ranges. These include:
- Partisol instruments (2000-H and 2000-S) to measure PM2.5 or PM10. These are low volume instruments which operate at a flow rate of 16.7 l/min. By weighing on our Sartorius analytical balance (precision 1 μg) before and after sampling it means that collected mass can be calculated. Particles are collected onto 47mm diameter filters which can then be used for further analyses, e.g. EDXRF.
- Staplex HiVol instruments to measure PM10. These are high volume instruments that collect particles onto large rectangular filters which can be used for further analyses including GC-MS.
- Personal Sioutas cascade impactors to measure size-segregated PM10. These small impactors can be worn on the body with an air pump that works at 9 l/min. PM10 is subdivided into 5 size fractions, each collected on different filters (25 mm and 37 mm). By weighing on our Sartorius analytical balance (precision 1 μg) before and after sampling it means that collected mass can be calculated.
Measuring particle number
We have instruments designed to measure total particle number concentration (PNC) and size-segregated PNC:
- Lighthouse handheld size-segregated PNC instrument measures the number concentration of particles between 300 nm and 10 μm in up to 6 size fractions simultaneously.
- Brechtel Mixing Condensation Particle Counter (MCPC) 1710 for the measurement of total PNC in the size range 5.5 nm – 10 μm. It features a fast response time of 180 ms and can measure concentrations up to 180,000 cm3.