24 1001 Brian Heikes University of Rhode Island Formaldehyde From Coil Collection SONEX 1 1 1997 10 20 1998 03 18 0 mid-time of sample in UT s 3 1.0 1.0 1.0 999999 999999 99999 start-time of sample in UT (s) end-time of sample in UT (s) CH2O (pptv) 3 data for exchange reported data is not positive definite negative values denote lower limit of detection or upper limit of detection 4 Formaldehyde measurements used the method of Lazrus, et al., 1988. data below detection limit, ch2o=50, reported as -888 data greater than that which is recordable is reported as -777 mid start stop ch2o 30330 30180 30480 117 30930 30780 31080 -888 31530 31380 31680 173 32130 31980 32280 118 32730 32580 32880 70 33330 33180 33480 145 33930 33780 34080 97 34530 34380 34680 69 35130 34980 35280 52 35730 35580 35880 101 36330 36180 36480 51 36930 36780 37080 128 37530 37380 37680 78 38130 37980 38280 62 38730 38580 38880 -888 39330 39180 39480 -888 39930 39780 40080 -888 40530 40380 40680 -888 41130 40980 41280 -888 41730 41580 41880 84 42330 42180 42480 -888 42930 42780 43080 -888 43530 43380 43680 90 44130 43980 44280 -888 44730 44580 44880 -888 45330 45180 45480 -888 45930 45780 46080 -888 46530 46380 46680 60 47130 46980 47280 -888 47730 47580 47880 -888 48330 48180 48480 -888 48930 48780 49080 -888 49590 49440 49740 -888 50190 50040 50340 -888 50790 50640 50940 -888 51390 51240 51540 -888 51990 51840 52140 -888 52590 52440 52740 80 53190 53040 53340 -888 53790 53640 53940 99999 54390 54240 54540 99999