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D2187-17 – Standard Test Method Technical Guide
📐 Scope and Applicability of ASTM D2187-17
ASTM D2187-17, Standard Test Methods and Practices for Evaluating Physical and Chemical Properties of Particulate Ion-Exchange Resins, is a critical standard issued under the fixed designation D2187. This standard encompasses thirteen distinct test methods and practices specifically designed for evaluating ion-exchange resins utilized in water treatment. A key feature of the standard is its applicability to both new and used materials, allowing for comprehensive quality control and performance monitoring throughout the resin lifecycle. All values in the standard are stated in SI units.
💡 Important Note: While the standard provides a suite of 13 methods, the specific tests required depend on the resin application (cation, anion, or mixed bed) and whether the evaluation is for initial qualification or operational troubleshooting. The standard was developed in accordance with internationally recognized principles on standardization.
⚙️ Core Test Methods and Essential Terminology
The standard divides testing into physical and chemical evaluations. Physical properties include Water Retention Capacity (Test Method B), Backwashed and Settled Density (Test Method C), and Particle Size Distribution (Test Method D). Chemical performance is assessed by Salt-Splitting Capacity (Test Methods E and H) and Total Capacity (Test Methods F and M). The standard also defines specific terminology to ensure consistent application.
| 🟦 Test Sections | 📏 Method/Practice | 🎯 Property | ⚡ Resin Type |
|---|---|---|---|
| 11 – 18 | Method B | Water Retention Capacity | All Types |
| 19 – 26 | Method C | Backwashed & Settled Density | All Types |
| 27 – 35 | Method D | Particle Size Distribution | All Types |
| 36 – 45 | Method E | Salt-Splitting Capacity | Cation |
| 46 – 55 | Method F | Total Capacity | Cation |
| 65 – 73 | Method H | Total & Salt-Splitting Capacity | Anion |
| 109 – 117 | Practice M | Total Anion Capacity | Anion |
Understanding the specific language used in the standard is critical. Section 3 provides explicit definitions for key terms which govern the scope of the testing protocols.
| 📐 Term | ⚡ Definition (Clause 3.2) |
|---|---|
| Anion-Exchange Material | Material capable of the reversible exchange of negatively charged ions. |
| Cation-Exchange Material | Material capable of the reversible exchange of positively charged ions. |
| Ion-Exchange Resin | A synthetic organic ion-exchange material. |
| Mixed Bed | A physical mixture of anion-exchange material and cation-exchange material. |
© 2026 TNLab — This article is a technical interpretation for reference only. The original standard as published by ASTM International takes precedence.