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D6333-23 – Standard Test Method Technical Guide
📋 Overview and Scope of D6333-23
Standard Practice D6333-23 provides a definitive methodology for the collection of dislodgeable pesticide residues from indoor floor surfaces. This practice is critical for assessing potential human exposure through dermal contact or transfer to clothing following pesticide application or migration.
The procedure detailed in this standard is applicable to a wide range of floor types, including both bare surfaces and covered surfaces such as residential carpeting and vinyl flooring. It covers pesticides listed in Practice D4861, whether applied directly or transported via tracking or migration.
💡 Scope Clarification: While this practice covers the physical collection of residues, the specific analytical procedures for quantifying the pesticides are beyond its scope. Users must refer to Practice D4861 for guidance on the selection of sampling and analytical techniques for the targeted pesticides.
Values stated in SI units are regarded as the standard, ensuring global consistency in application (Section 1.6).
📐 Key Terminology and Surface Applicability
Understanding the precise definitions set forth in D6333-23 is essential for proper implementation. The following table summarizes the critical terms defined in Section 3.
| 🟦 Term | 📏 Definition / Formula Context |
|---|---|
| Dislodgeable Residue | The portion of a chemical residue on a solid surface that may be transferred to human skin or clothing via direct contact. |
| Sampling Traverse | The distance over which the sampling media contacts the floor surface for a single sample collection. |
| Transfer Coefficient | The ratio of the amount of pesticide collected by the media to the area of the surface contacted during a traverse. |
| Transfer Efficiency | The ratio of the transfer coefficient to the pesticide surface loading determined by deposition coupon analysis. |
The standard has been validated for specific flooring materials. The table below outlines the applicaple surfaces as tested.
| 🎯 Surface Type | 📐 Material Composition | ✅ Validation Status |
|---|---|---|
| Plush Carpeting | Nylon | Successfully Applied |
| Level-Loop Carpeting | Polypropylene | Successfully Applied |
| Hard Surface Flooring | Vinyl | Successfully Applied |
⚙️ Referenced Standards and Safety Considerations
D6333-23 references several key ASTM standards to ensure cohesive testing protocols. Users must also adhere to comprehensive safety, health, and environmental practices.
⚠️ Regulatory Compliance: It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use, as per Section 1.7.
Key referenced documents include:
- D1193: Specification for Reagent Water (ensuring purity for extraction).
- D1356: Terminology Relating to Sampling and Analysis of Atmospheres.
- D4861: Practice for Sampling and Analytical Techniques for Pesticides and PCBs in Air.
- E1 and E337: Specifications for thermometers and humidity measurement psychrometers.
❓ Frequently Asked Questions
🔍 What is the primary purpose of D6333-23?
This practice provides a standardized method for collecting dislodgeable pesticide residues from indoor floors. The objective is to estimate the potential for human exposure through direct contact or tracking.
💡 To which floor surfaces has this practice been successfully applied?
The standard has been validated for nylon plush carpeting, polypropylene level-loop carpeting, and vinyl flooring, as specified in Section 1.4.
⚡ Which standard governs the analytical procedures for the collected samples?
While D6333-23 covers the collection methodology, the analytical procedures are beyond its scope. Users must refer to ASTM D4861 for guidance on the sampling and selection of analytical techniques for the targeted pesticides.
📌 How is a ‘Sampling Traverse’ defined in this standard?
A sampling traverse is the defined distance from the starting point to the end point over which the sampling media contacts the floor surface during the collection of a single sample, ensuring consistency in the collection area.