Table 3 Levels of karrikins (KAR1 and KAR2) determined in smoke water samples using the standard addition method
Samples | Calibration curve (KAR1) | R2 | KAR1 (nmol/l) | Calibration curve (KAR2) | R2 | KAR2 (nmol/l) | KAR1:KAR2 ratio |
|---|---|---|---|---|---|---|---|
SW1_1993 | y = 9.42*1012 (± 1.2*1011)x + 1.1*105 (± 4.2*104) | 0.997 | 11.7 ± 4.3 | y = 3.2*1012 (± 1.2*1011)x + 6.9*104 (± 1.1*104) | 0.992 | 21.7 ± 2.7 | 0.5 |
SW2_1998 | y = 9.1*1012 (± 1.0*1011)x + 3.0*105 (± 1.0*104) | 0.999 | 32.5 ± 1.4 | y = 5.3*1012 (± 7.0*1010)x + 1.5*105 (± 1.9*104) | 0.998 | 28.9 ± 4.1 | 1.1 |
SW3_1994 | y = 3.9*1012 (± 4.1*1010)x + 2.5*105 (± 5.5*103) | 0.999 | 63.2 ± 1.5 | y = 2.6*1012 (± 2.7*1010)x + 2.3*105 (± 3.8*103) | 0.999 | 88.7 ± 1.4 | 0.7 |
SW4_1999 | y = 1.1*1013 (± 5.7*1010)x + 1.1*105 (± 4.5*103) | 0.998 | 9.4 ± 0.4 | y = 7.0*1012 (± 3.6*1010)x + 10.0*104 (± 1.1*104) | 0.999 | 14.3 ± 1.5 | 0.7 |
SW5_2003 | y = 5.7*1012 (± 4.9*1010)x + 4.2*105 (± 1.8*104) | 0.999 | 74.4 ± 3.7 | y = 3.8*1012 (± 4.2*1010)x + 2.4*105 (± 1.1*104) | 0.999 | 64.2 ± 3.5 | 1.2 |
SW6_2003 | y = 3.9*1012 (± 6.2*1010)x + 3.7*105 (± 1.4*104) | 0.999 | 101.6 ± 7.9 | y = 2.5*1012 (± 3.6*1010)x + 7.1*104 (± 2.2*103) | 0.999 | 28.8 ± 1.7 | 3.5 |
SW7_2003 | y = 1.0*1013 (± 5.5*1010)x + 1.6*106 (± 5.0*104) | 0.984 | nd | y = 9.5*1012 (± 1.4*1011)x + 6.9*105 (± 7.9*104) | 0.998 | nd | – |
SW8_2004 | y = 1.0*1013 (± 1.6*1011)x + 1.7*106 (± 5.3*104) | 0.990 | nd | y = 9.5*1012 (± 1.3*1011)x + 8.8*105 (± 5.2*104) | 0.999 | nd | – |