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Table 4 Active ingredients, pH, and particle size of indigo-paste samples from Guizhou Province

From: Quality blues: traditional knowledge used for natural indigo identification in southern China

Sample number Quality grade Effective components content(ug/g) Percentage of effective ingredients (%) PH** Particle size(d=nm)
Indigo Indirubin Indigo(W) * Indirubin(W) ** Indigo(D) ** Indirubin(D) **
1-1 1 11268.55 10221.73 0.37 0.33 1.13 1.02 9.10 531.2–825 (100%)
1-2 1 14486.60 5441.57 0.41 0.15 1.45 0.54 9.47 396.1–825 (100%)
1-3 1 13218.67 4096.02 0.57 0.18 1.32 0.41 9.13 91.28–1281 (87.4%)/4145–5560 (12.6%)
2-1 2 10466.89 3174.17 0.21 0.06 1.05 0.32 10.03 342–825 (90.9%)/4801–5560 (9.1%)
2-2 2 10583.21 4189.60 0.41 0.16 1.06 0.42 9.18 91.28–164.2 (12.7%)/396.1–1106 (87.3%)
2-3 2 10590.91 4366.99 0.28 0.12 1.06 0.44 10.92 122.4–255 (17.2%)/615.1−2669 (82.8%)
3-1 3 10164.60 2903.67 0.23 0.07 1.02 0.29 10.98 141.8–255(19%)/531.2–1718 (81%)
3-2 3 8840.08 2357.28 0.20 0.05 0.88 0.24 10.83 220.2–712.4 (100%)
3-3 3 10672.38 2022.68 0.11 0.02 1.07 0.20 10.66 105.7–190.1 (23.6%)/531.2–1106 (76.4%)
3-4 3 10430.08 1921.20 0.32 0.06 1.04 0.19 10.21 141.8–255 (29.7%)/825–2305 (70.3%)
3-5 3 10832.98 1193.15 0.46 0.05 1.08 0.12 11.55 220.2–955.4 (96%)/4145–5560 (4%)
3-6 3 10457.34 2065.58 0.26 0.05 1.05 0.21 10.85 91.28–164.2 (17.4%)/342–825 (82.6%)
3-7 3 10097.03 1470.28 0.25 0.04 1.01 0.15 11.29 78.82–141.8 (13.2%)/220.2–955.4 (86.8%)
4-1 4 7976.97 1818.84 0.16 0.04 0.80 0.18 11.06 91.28–141.8 (8.5%)/458.7–1106 (88.9%)/5560 (2.7%)
4-2 4 9235.30 1134.66 0.37 0.05 0.92 0.11 10.39 122.4–220.2 (21.5%)/531.2–1718 (76.6%)/5560 (1.9%)
4-3 4 10334.90 1386.50 0.18 0.02 1.03 0.14 11.36 122.4–220.2 (30.1%)/531.2–1281 (67.2%)/5560 (2.8%)
4-4 4 9251.13 1480.47 0.20 0.03 0.93 0.15 11.34 78.82–164.2 (13.2%)/255–712.4 (86.8%)
4-5 4 9691.15 1316.95 0.29 0.04 0.97 0.13 11.53 91.28–825 (84.4%)/3580–5560 (15.6%)
5-1 5 7834.44 1103.13 0.10 0.01 0.78 0.11 11.22 78.82–105.7 (7.4%)/396.1–955.4 (92.6%)
5-2 5 8106.15 1062.89 0.14 0.02 0.81 0.11 11.64 91.28–141.8 (7.5%)/295.3–825 (80%)/4145–5560 (12.5%)
5-3 5 10369.98 894.61 0.26 0.02 1.04 0.09 11.43 141.8–295.3 (24.9%)/712.4–1484 (75.1%)
  1. Significance is indicated by *P < 0.05, **P < 0.001
  2. Note: W wet weight, D dry weight