Amorphophallus campanulatus dry purified extract

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Test material

Reference

Name:

Unnamed

Type:

Constituent

Details on test material:

Test article identification : Amorphophallus Campanulatus Dry Purified Extract
Batch number : 29895/M1
Chemical class : Botanical extract
Preparation date : April 2009
Expiry date : April 2011

The test article was stored at room temperature in the dark.

Results and discussion

Surface tension

Surface tension:

48 mN/m

Temp.:

20 °C

Any other information on results incl. tables

The determinations were performed at 20.0± 0.5°C in water.

The tabulate value at 20.0 ± 0.5°C is 72.75 mN/m for water.

After zero point adjustment, the surface tension of the distilled water (sg) was determined to be 72.60 mN/m at 20°C, giving a f (water) = 1.0021.

The test article was tested at aqueous dilution at 1g/L.

Six measurements were performed; the data and the results are reported in Table 1, 2 and 3.

TABLE 1 Amorphophallus CampanulatusDry Purified Extract:

surface tension values at 20°C

Measurements (mN/m)	Solution at 1 g/L (mN/m)
1^st	50.1
2^nd	49.9
3^rd	49.5
4^th	49.7
5^th	49.8
6^th	49.7
Average values (a)	49.8
S.D.	0.1849
C.V. %	0.37%

TABLE 2 Amorphophallus CampanulatusDry Purified Extract:

surface tension at 20°C. Correction with water calibration factor

ChemService Code Number	Average values (a) (mN/m)	f (water) calibration factor	Corrected values (b) (mN/m)
Solution at 1 g/L (mN/m)	49.8	1.0021	49.9

TABLE 3 Amorphophallus CampanulatusDry Purified Extract:

surface tension at 20°C. Correction table and interpolation method

Sample solution (mg/L)	Corrected values (b) (mN/m)	Tab. X1 (mN/m)	Tab. X2 (mN/m)	Tab. Y1 (mN/m)	Tab. Y2 (mN/m)	Slope (m)	Interc. (q)	St (mN/m)
Solution at 1 g/L (mN/m)	49.9	46.5	48.6	48.0	50.0	0.9524	3.7143	48.5

Applicant's summary and conclusion

Conclusions:

From the experimental data obtained according to the guideline A.5 in Official Journal L 383 Part A, it can be concluded that the surface tension of the aqueous solution at concentration of 1 g/L, at 20°C is 48.5 mN/m.


According to the interpretation of the results suggested in the A.5 official method, the sample of Amorphophallus Campanulatus Dry Purified Extract formulation should be regarded as a surface-active material.