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D2575-70 – Standard Test Method Technical Guide
📝 Scope and Referenced Test Methods
ASTM D2575-70 (Reapproved 1998) covers the selection and application of procedures for testing polymerized fatty acids. Rather than providing fully detailed procedures, it specifies the use of related ASTM standard test methods for critical quality parameters.
| 🟦 Test Parameter | 📏 Reference ASTM Method |
|---|---|
| Sampling | D 1466 |
| Acid Value | D 1980 |
| Saponification Value | D 1962 |
| Unsaponifiable Matter | D 1965 |
| Water (Karl Fischer) | D 1364 |
| Color (Gardner) | D 1544 |
⚠️ Important Note on Methodology: This standard acts as a guide for selecting appropriate ASTM test methods. Laboratory personnel must consult the full text of the referenced standards (e.g., D 1980, D 1364) for complete apparatus, reagent specifications, and detailed procedural instructions.
📊 Precision and Key Measurement Data
The standard provides critical precision statements for each test method at the 95 % confidence level. These values are essential for validating laboratory results and assessing analytical variability. The data below reflects the specific ranges reported for polymerized fatty acids.
| 📐 Test | 🎯 Value Range | ⚡ Repeatability | 📌 Reproducibility |
|---|---|---|---|
| Acid Value | 162 – 195 | ± 1.5 | ± 2.4 |
| Saponification Value | 187 – 197 | ± 10.7 | ± 11.1 |
| Unsaponifiable Matter (%) | 0.3 – 2.6 | ± 0.53 | ± 0.75 |
| Water (Karl Fischer) (%) | 0.0 – 1.2 | ± 0.16 | ± 0.17 |
| Color (Gardner) | 1 – 18 (units) | <