Summary of validation results

No.Compound nameLiner range (ug/L)LLOQ (ug/L)LLOD (ng/L)R2Intra-day precision (%)Inter-day precision (%)Recovery rate (%)
LowMediumHighLowMediumHighLowMediumHigh
1Serine25.21–43,768.100.2666.180.9968.4010.4911.777.147.011.85104.50108.29108.92
2Threonine49.70–42,976.420.2460.660.9999.9810.868.334.565.885.6393.94100.4989.23
32-Aminoacetic acid9.00–10,421.200.1947.270.9979.3612.358.984.178.615.5989.4380.28115.28
4Alanine16.92–19,555.760.3637.400.9994.648.795.565.468.315.2285.2394.6380.77
55-Aminopentanoic acid13.81–7,990.006.901,725.951.0005.989.189.753.205.646.5788.4699.7780.91
62-Aminobutanoic acid20.24–23,344.942.38396.460.9986.328.364.076.108.972.9382.5983.9681.03
72-(Methylamino)acetic acid10.86–12,573.770.2356.130.99913.283.379.865.518.872.6084.3585.0585.40
8Proline18.49–22,274.320.1742.270.9985.298.952.8511.447.982.63113.16102.2781.71
9Ile-Val61.90–35,683.3561.9014,564.630.9937.697.131.945.368.285.4590.5380.2488.67
10Octan-1-amine14.82–5,830.550.013.700.99610.896.475.028.6812.388.1898.1492.7397.06
11Ornithine31.97–36,878.520.63157.050.99713.507.690.7010.575.795.6283.2982.3181.85
12Butan-1-amine7.31–8,218.440.011.000.9992.726.296.743.578.729.4793.9193.91115.95
13Peonol30.27–34,900.357.121,780.630.9934.068.242.545.172.876.2193.0888.7095.26
142-Phenylethylamine5.23–6,048.565.231,306.570.9995.953.056.2410.522.8914.7288.7294.6595.06
152-Vanillin39.86–69,191.810.42104.620.99712.0914.0912.925.375.027.3780.24107.46108.28
16Syringic aldehyde18.37–21,261.142.30382.700.99813.239.065.2314.689.165.8897.1695.2596.17
17Pentan-1-amine6.23–7,111.350.77128.230.9984.486.885.5310.998.089.9595.4390.46101.00
18Tyramine14.65–16,954.7414.653,662.190.9996.674.248.4211.788.255.02100.0099.2299.00
19Coniferaldehyde11.65–13,477.9111.651,552.750.9995.995.827.9111.048.293.54100.7397.7097.78
204-Hydroxycinnamic acid17.19–19,819.614.041,011.200.9994.798.214.0010.029.2712.2492.7387.48105.26
21Phenol0.77–2,384.890.012.060.9965.365.423.944.738.834.1691.6182.5795.53
22Tyrosine20.56–35,480.101.37228.930.99710.728.3210.148.569.238.5184.23101.8583.86
23Hexan-1-amine7.02–7,968.400.86144.010.9977.175.066.128.3412.6912.2891.9190.3899.12
24Lysine14.76–18,012.401.64273.960.9973.128.228.5314.027.540.67106.3794.6788.41
254-Allylsyringol3.66–12,966.414.88366.110.99913.6514.8814.3614.7114.9312.95111.97103.5884.74
26Heptan-1-amine1.43–4,582.550.2562.140.9966.124.776.476.004.008.1791.6394.1697.30
274-Hydroxybenzaldehyde13.82–15,991.253.45575.680.9968.767.623.775.204.733.9786.3985.63117.59
28Octopamine14.53–8,408.4314.533,632.670.99913.377.402.4810.9413.418.2182.4786.8391.16
294-Ethylphenol2.10–20,511.880.0918.080.9968.7913.2613.096.144.535.81100.1695.48100.90
30Dodecan-1-amine1.14–172.290.011.520.9959.489.126.4114.2913.3611.8699.2793.2492.20