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D1034-94 – Standard Test Method Technical Guide
This article provides a detailed technical overview of ASTM D1034-94, the standard specification for Fluor-Chrome-Arsenate-Phenol used as a wood preservative. The standard covers both dry and solution forms and outlines strict compositional requirements.
📖 Scope and Referenced Standards
This specification covers fluor-chrome-arsenate-phenol in dry form or in solutions for the preservative treatment of wood. The standard references ASTM D 1035, which provides test methods for chemical analysis of the preservative.
🧪 Chemical Composition and Analytical Limits
The active ingredients in the preservative must conform to the following composition:
| 🟦 Component | 📏 Percentage |
|---|---|
| Fluoride, as F | 22% |
| Hexavalent chromium, as CrO3 | 37% |
| Arsenic, as As2O5 | 25% |
| Dinitrophenol | 16% |
The analytical composition of the active ingredients must fall within specified limits:
| 🟦 Component | 📐 Min % | 🎯 Max % |
|---|---|---|
| Fluoride, as F | 20 | 24 |
| Hexavalent chromium, as CrO3 | 33 | 41 |
| Arsenic, as As2O5 | 22 | 28 |
| Dinitrophenol | 14 | 18 |
The solid preservative or treating solution must be made from water-soluble compounds with over 95% purity on an anhydrous basis. Commercial products must be labeled with total active ingredients.
Note: An equal amount of sodium pentachlorophenate may be used in place of dinitrophenol provided the pH of the treating solution exceeds 7.0.
⚙️ pH and Solution Requirements
The pH of a treating solution must be between 5.5 and 7.8, preferably measured at an oxide concentration of 15 to 22 g/L and a temperature of 20 to 30°C. Sodium or potassium hydroxide may be used to adjust the pH. The solution must be essentially free of insoluble matter.
Tip: Always ensure that the treating solution meets the pH requirements under the specified conditions to comply with the standard.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D1034-94?
It covers fluor-chrome-arsenate-phenol in dry form or solutions for wood preservative treatment.
💡 What are the required active ingredients?
Fluoride 22%, Hexavalent chromium 37%, Arsenic 25%, and Dinitrophenol 16%.
⚡ What is the acceptable pH range?
The pH must be between 5.5 and 7.8, measured at 15-22 g/L oxide concentration and 20-30°C.
📌 How is the preservative analyzed?
According to ASTM D 1035 Test Methods for Chemical Analysis.