5tyrene Monitoring Styrene is a commercially important chemical, used in the manufacture of polystyrene foams

Question 1 —5C It is also carcinogenic, with inhalation and absorption through the eyes and skin being significant routes of exposure. You plan to monitor a number of workers for 6 hours each using personal sampling in accordance with NIOSH 1501. If the limit of detection for styrene using is 0.4 pgfsample, and previous monitoring at the site indicated levels of 0.21 mgjm3, how long would you need to sample at a flow rate of 500 mLfmin to detect this concentration? Would this be reasonable and why? [3 marks)