YS/T 1115.12-2016 in English
VALIDMethods for chemical analysis of copper ores and tailings—Part 12: Determination of copper, lead, zinc, nickel, cobalt, cadmium, magnesium and manganese contents—Inductively coupled plasma atomic emission spectrometric method
- Issued on:2016-07-11
- Implemented on:2017-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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本部分规定了铜原矿和尾矿中铜、铅、锌、镍、钴、镉、镁和锰量的测定方法。本部分适用于铜原矿和尾矿中铜、铅、锌、镍、钴、镉、镁和锰量的测定。
Introduction
Standard Technical Background
This standard belongs to Part 12 of the YS/T 1115-2016 series. For the raw ore and tailings samples produced during the copper mining and dressing process, a multi-element synchronous detection scheme of inductively coupled plasma atomic emission spectrometer is established. Compared with traditional atomic absorption spectrometry (AAS), ICP-AES technology has the advantages of low detection limit, wide linear range, and simultaneous determination of multiple elements.
Key points of the method
| Technical parameters | Traditional AAS method | Standard ICP-AES method |
|---|---|---|
| Number of elements determined in a single time | 1 | 8 |
| Detection range of copper element | 0.01-5% | 0.01-2.5% |
| Sample preparation time | About 2 hours/element | 1 hour/8 elements |
Key Operation Flow
Sample Decomposition System: A four-acid system of hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid is used to ensure the complete decomposition of silicate minerals. Hydrofluoric acid is used to destroy the silicon-based structure, and perchloric acid can oxidize organic matter.
Instrument Calibration: The standard curve correlation coefficient R²≥0.999 is required, and characteristic spectral lines such as 214.439nm (Cd), 285.213nm (Mg) are used to avoid spectral interference.
Quality control requirements
Strict regulations of the standard:
- Instrument resolution <0.01nm (at 200nm)
- Short-term stability RSD <1%
- Repeatability limit: Copper 0.014-1.58% interval error ≤0.12%
Implementation suggestions
1. Matrix matching: The standard solution must maintain the same 5% nitric acid medium as the sample
2. Interference correction: It is recommended to use Y or Sc as the internal standard element
3. Method validation: New laboratories should be validated by the GSB series of standard substances
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