Table 1 Apparent parameters of ONs molecules in different time intervals of haze days and clean days

From: Evolution of atmospheric high-molecular-weight Organonitrates (HMW ONs) in urban Yangtze River Delta (YRD), China

Time interval

Number of molecules

C

Mw (Da)

DBEw

O/Cw

(O-2N)/Cw

H/Cw

Xc

DBE/Cw

H-MEM

389

31

581.62

7.58

0.32

0.23

1.62

1.55

0.24

H-M

395

31

580.77

7.68

0.31

0.21

1.62

1.57

0.25

H-A

327

35

629.46

8.09

0.28

0.20

1.63

1.63

0.23

H-N

375

32

587.88

7.81

0.30

0.22

1.60

1.62

0.25

H-Daytime

722

33

605.11

7.89

0.30

0.21

1.63

1.60

0.24

H-Nighttime

764

31

584.75

7.69

0.31

0.22

1.61

1.58

0.25

H-total

1486

32

594.93

7.79

0.30

0.21

1.62

1.59

0.24

C-MEM

178

27

490.09

7.33

0.28

0.17

1.63

1.93

0.27

C-M

280

35

642.98

8.67

0.31

0.22

1.59

1.77

0.25

C-A

117

37

694.45

8.00

0.30

0.21

1.66

1.57

0.22

C-N

150

36

682.32

8.44

0.32

0.23

1.62

1.61

0.23

C-Daytime

397

36

668.72

8.33

0.30

0.22

1.63

1.67

0.23

C-Nighttime

328

32

586.21

7.88

0.30

0.20

1.62

1.77

0.25

C-total

725

34

627.46

8.11

0.30

0.21

1.63

1.72

0.24

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