Limonene 4.5ppbO3 20ppb

17.07.2009

09:17 sampling chamber housing air

09:49 during a flush

09:50 reduced the spike in particle number substantially by pushing the lower frame up about 30sec before the flush cycle was due to finish

(made sure the bag was operating at a slightly over pressure)

9min ALO (10:19)

20min ALO (mode is growing)

40min ALO

1 HOLA

1h17min ALO another 10ppb Limonene were injected to test the lack of VOC detection by the

PTR. The screen shot is at 1h40min ALO

The three modes are 30, 47 and 66nm

2h5min ALO

13:34 Lights off (3h15min)