Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts

Importancia y uso:

4.1 The concentration of tannin in extracts must be reduced to analytical strength (4 g tannin per L) for analysis.

4.2 Vegetable tannin extracts are heterogeneous mixtures of components with varying solubility.

4.3 The solubility of such extracts is influenced by temperature and concentration, which affect the degree of dispersion and size of the component particles.

4.4 While the solubility is better in hot water than in cold water, it is appropriate to dissolve and disperse an extract in hot water and then let the solution cool slowly to standard room temperature.

Subcomité:

D31.01

Referida por:

D4900-99R20, D6402-99R20, D6406-99R20, D4903-99R20, D4899-99R20, D4904-99R20, D6407-99R20, D6401-99R20, D6409-99R20

Volúmen:

15.04

Número ICS:

59.140.10 (Processes and auxiliary materials)

Palabras clave:

analytical solution; tannin analysis; vegetable tannin analysis;