During fuel combustion @entity349 , as @entity37359 and @entity10694 forms, is emitted to the atmosphere. Effective reduction of @entity349 emission requires applying speciation systems for emission control and research. An important part of all @entity349 determination and speciation systems are the calibrators. Calibrators are responsible for the accuracy of @entity349 determination and, in consequence, the effective reduction of @entity349 emission. The aim of the work was to construct a portable @entity3143 calibrator. The purpose of the device was the control of @entity349 speciation systems for continuous measurements and study of @entity3143 sorption. As a result of previously conducted research, the portable @entity10694 ultrasonic calibrator was designed, constructed and tested. The ultrasonic calibrator generates a stable stream of @entity3143 (RSD=2.8% for CHg=28  g/m(3)). The correlation between theoretical and reading concentration of @entity3143 was R(2)=0.9983. The average recovery of @entity3143 was 95%. The advantages of the ultrasonic @entity10694 calibrator are: high accuracy and selectivity, low pressure of @entity3143 stream and very low cost of production. The calibrator was successfully tested, both in the laboratory and in the power plant, during a preliminary study on @entity3143 sorption on a @entity238 ash filter.

The construction and testing of the portable @entity10694 ultrasonic calibrator for the control of XXXX speciation systems.

@entity10694 :: ('CHEBI:25198', 'Chemical') :: ['Hg(2+)'] @entity3143 :: ('MESH:D008627', 'Chemical') :: ['HgCl2'] @entity349 :: ('MESH:D008628', 'Chemical') :: ['mercury'] @entity37359 :: ('CHEBI:16170', 'Chemical') :: ['Hg(0)'] @entity238 :: ('7227', 'Species') :: ['fly']
@entity349 :: (MESH:D008628,Chemical) :: ['mercury']
