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Table 3 Levels of karrikins (KAR1 and KAR2) determined in smoke water samples using the standard addition method

From: Quantification of karrikins in smoke water using ultra-high performance liquid chromatography–tandem mass spectrometry

SamplesCalibration curve (KAR1)R2KAR1 (nmol/l)Calibration curve (KAR2)R2KAR2 (nmol/l)KAR1:KAR2 ratio
SW1_1993y = 9.42*1012 (± 1.2*1011)x + 1.1*105 (± 4.2*104)0.99711.7 ± 4.3y = 3.2*1012 (± 1.2*1011)x + 6.9*104 (± 1.1*104)0.99221.7 ± 2.70.5
SW2_1998y = 9.1*1012 (± 1.0*1011)x + 3.0*105 (± 1.0*104)0.99932.5 ± 1.4y = 5.3*1012 (± 7.0*1010)x + 1.5*105 (± 1.9*104)0.99828.9 ± 4.11.1
SW3_1994y = 3.9*1012 (± 4.1*1010)x + 2.5*105 (± 5.5*103)0.99963.2 ± 1.5y = 2.6*1012 (± 2.7*1010)x + 2.3*105 (± 3.8*103)0.99988.7 ± 1.40.7
SW4_1999y = 1.1*1013 (± 5.7*1010)x + 1.1*105 (± 4.5*103)0.9989.4 ± 0.4y = 7.0*1012 (± 3.6*1010)x + 10.0*104 (± 1.1*104)0.99914.3 ± 1.50.7
SW5_2003y = 5.7*1012 (± 4.9*1010)x + 4.2*105 (± 1.8*104)0.99974.4 ± 3.7y = 3.8*1012 (± 4.2*1010)x + 2.4*105 (± 1.1*104)0.99964.2 ± 3.51.2
SW6_2003y = 3.9*1012 (± 6.2*1010)x + 3.7*105 (± 1.4*104)0.999101.6 ± 7.9y = 2.5*1012 (± 3.6*1010)x + 7.1*104 (± 2.2*103)0.99928.8 ± 1.73.5
SW7_2003y = 1.0*1013 (± 5.5*1010)x + 1.6*106 (± 5.0*104)0.984ndy = 9.5*1012 (± 1.4*1011)x + 6.9*105 (± 7.9*104)0.998nd
SW8_2004y = 1.0*1013 (± 1.6*1011)x + 1.7*106 (± 5.3*104)0.990ndy = 9.5*1012 (± 1.3*1011)x + 8.8*105 (± 5.2*104)0.999nd