SN/T 5572-2024 in English
VALIDSolid waste attribute identification method - Phase identification - X-ray diffraction method
- Issued on:2024-12-31
- Implemented on:2025-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$219.00
| Standard No: | SN/T 5572-2024 |
| Document status: | VALID |
| Title in English: | Solid waste attribute identification method - Phase identification - X-ray diffraction method |
| Title in Chinese: | 固体废物属性鉴别方法 物相鉴别 X射线衍射法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2024-12-31 |
| Implemented on: | 2025-07-01 |
| ICS Classification: | 13.030.99-Other standards related to wastes |
| Chinese Classification: | Z71-Ordinary solid waste control standards |
| Professional Classification: | SN-Import&Export Inspection |
| Related Keywords: | solid waste identification
phase identification solid waste x-ray diffraction method introduction technical background x-ray diffraction |
Introduction
Technical background and evolution of standards
As the latest industry standard issued by the General Administration of Customs in 2024, this standard fills the gap in the standardization of X-ray diffraction technology in the field of solid waste identification. Compared with traditional chemical analysis methods, X-ray diffraction has the advantages of non-destructive and multi-phase simultaneous detection, and is particularly suitable for phase identification of complex mixtures.
Core method principle
Based on the Bragg equation (2d(hkl)sinθ=nλ), the crystal plane spacing d value is calculated by measuring the diffraction angle 2θ, and the phase identification is achieved by comparing the PDF card database. Key technical indicators include:
| Parameters | General requirements | Special requirements |
|---|---|---|
| X-ray source | Copper target (λ=1.5418Å) | Fe/Co, etc. need to be defluoresced |
| Scanning range | 4-80°(2θ) | Adjust according to the phase |
| Step accuracy | ≤0.026° | High resolution requires ≤0.01° |
Key operating specifications
Sample preparation requirements
- Powder samples: need to be ground to <0.075mm, and dried at 105℃ for 2h
- Block samples: surface polished to mirror surface, or processed into chips
- Special samples: liquid nitrogen freezing embrittlement treatment
Data analysis process
- Subtract background noise
- Calibrate characteristic peak positions (top 8 peaks first)
- Limit the search scope by elemental composition
- Step-by-step analysis of multiple phases
Analysis of typical cases
Case 4 - Identification of zirconium ore: The declared phase is inconsistent with the measured zircon (ZrSiO4) and rutile (TiO2), and combined with the abnormal Fe/Ti content, it is determined to be a smelting by-product.
Case 9-Bleaching essence: Calcium hypochlorite (Ca(ClO)2) and sodium chloride mixture were detected, which does not meet the purity characteristics of industrial products.
Implementation suggestions
- It is recommended to configure energy dispersive spectrometer (EDS) to assist element analysis
- Establish a database of characteristic phases of common solid wastes
- Combined with GB 34330 for comprehensive judgment
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
