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Table 1 Regulatory standards and experimental results of purity and contaminant tests

From: Quality assurance for Chinese herbal formulae: standardization of IBS-20, a 20-herb preparation

Pharmaceutical name

Foreign matters

Ash

  

Extractives

Total ash

Acid-insoluble Ash

Water content

Water-soluble extractives

Ethanol-soluble extractives

Radix Angelicae Dahuricae

--

(<1.0%)

6.0%a

(4.1%)

1.5%a

(<1.0%)

14%a

(10%)

--

(27%)

15%a

(17%)

Herba Artemisiae Scopariae

--

(<1.0%)

4.0%a

(2.9%)

2.0%a

(<1.0%)

15%a

(9.7%)

--

(25%)

--

(17%)

Rhizoma Atractylodis Macrocephalae

--

(<1.0%)

5.0%a

(3.7%)

1.0%a

<1.0%)

--

(10%)

--

(67%)

--

(12%)

Radix Aucklandiae

2.0%b

(<1.0%)

4.5%b

(3.2%)

1.0%b

(<1.0%)

14%b

(10%)

65%b

(68%)

15%b

(27%)

Radix Bupleuri

2.0%b

(<1.0%)

7.7%b

(1.0%)

3.5%b

(2.8%)

5.0%b

(4.4%)

12%b

(22%)

11%b

(17%)

Pericarpium Citri Reticulatae

--

(<1.0%)

--

(4.7%)

--

(1.4%)

13%a

(11%)

--

(39%)

--

(39%)

Radix Codonopsis

1.0%b

(<1.0%)

6.0%b

(4.1%)

2.5%b

(<1.0%)

12%b

(10%)

41%b

(60%)

21%b

(52%)

Semen Coicis

2.0%a

(<1.0%)

3.0%a

(2.3%)

--

(<1.0%)

15%a

(9.9%)

--

(6.0%)

5.5%a

(6.0%)

Rhizoma Coptidis

2.0%b

(<1.0%)

5.0%b

(2.5%)

2.5%b

(<1.0%)

12%b

(7.5%)

17%b

(23%)

14%b

(19%)

Cortex Fraxini

--

(<1.0%)

8.0%a

(4.7%)

--

(1.5%)

7.0%a

(6.5%)

--

(8.0%)

8.0%a

(8.7%)

Radix et Rhizoma Glycyrrhizae Praeparata cum Melle

--

(<1.0%)

5.0%a

(3.1%)

1.0%a

(<1.0%)

10%a

(8.1%)

--

(47%)

--

(43%)

Cortex Magnoliae Officinalis

1.0%b

(<1.0%)

8.0%b

(4.50%)

3.5%b

(1.6%)

12%b

(8.3%)

3.0%b

(8.0%)

5.0%b

(9.0%)

Radix Paeoniae Alba

1.0%b

(<1.0%)

4.0%b

(2.1%)

1.0%b

(<1.0%)

14%b

(7.1%)

21%b

(22%)

16%b

(17%)

Semen Plantaginis

--

(<1.0%)

6.0%a

(3.2%)

2.0%a

(<1.0%)

12%a

(10%)

--

(12%)

--

(3.3%)

Cortex Phellodendri Amurensis

1.0%b

(<1.0%)

8.5%b

(7.3%)

1.0%b

(<1.0%)

11%b

(8.7%)

9.0%b

(17%)

12%b

(16%)

Herba Pogostemonis

2.0%a

(<1.0%)

11%a

(8.6%)

4.0%a

(2.3%)

14%a

(9.1%)

--

(14%)

2.5%a

(10%)

Poria

--

(<1.0%)

4.0%a

(2.4%)

2.0%a

(<1.0%)

15%a

(9.5%)

--

(2.0%)

--

(2.6%)

Radix Saposhnikoviae

2.0%b

(<1.0%)

7.0%b

(5.1%)

2.5%b

(1.8%)

13%b

(7.7%)

22%b

(27%)

19%b

(25%)

Fructus Schisandrae Chinensis

1.0%a

(<1.0%)

--

(4.5%)

--

(1.4%)

--

(12%)

--

(30%)

--

(31%)

Rhizoma Zingiberis Praeparatum

--

(<1.0%)

7.0%a

(4.6%)

--

(<1.0%)

--

(5.8%)

--

(13%)

--

(7.8%)

  1. Note: Data in parentheses are experimental results of the samples.
  2. a Limit required by the Pharmacopoeia of the People's Republic of China (2005 edition)
  3. b Limit required by the Hong Kong Chinese Materia Medica Standards