ASTM D4905-99(2016)
Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
- Standard No.
- ASTM D4905-99(2016)
- Release Date
- 1999
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D4905-99(2020)
- Latest
- ASTM D4905-99(2020)
- Scope
4.1 The concentration of tannins in solid, pasty, and powdered extracts needs to be reduced to analytical strength for tannin analyses.
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 Since extracts have greater solubility in hot water than cold, it is desirable to dissolve and disperse an extract in hot water and then let the solution cool slowly to standard room temperature.
4.5 It is often difficult to reduce samples of solid and particularly pasty extracts to specimen size and at the same time ensure representative sampling. Therefore, caution is advised in drawing conclusions on the precision and bias of the results obtained on such extracts; where difficulties in sample preparation are experienced, little confidence can be placed in the results.
1.1 This practice covers a standard procedure for use in preparing the analytical solution required for the analysis of solid, pasty, or powdered vegetable tannin extracts.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D4905-99(2016) Referenced Document
- ASTM D4903 Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts*， 2020-12-01 Update
- ASTM D4904 Standard Practice for Cooling of Analytical Solutions*， 2020-12-01 Update
- ASTM D6403 Standard Test Method for Determining Moisture in Raw and Spent Materials*， 2020-12-01 Update
- ASTM D6404 Standard Practice for Sampling Vegetable Materials Containing Tannin*， 2020-12-01 Update
ASTM D4905-99(2016) history
- 2020 ASTM D4905-99(2020) Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
- 1999 ASTM D4905-99(2016) Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
- 1999 ASTM D4905-99(2009) Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
- 1999 ASTM D4905-99(2004) Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
- 1999 ASTM D4905-99 Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts
