What are the methods for detecting the content of precious metals in the recycling of precious metal waste?

The detection of precious metal waste content is a process of quantitative analysis of the precious metal components in metal waste, which has important significance in the field of metal recycling and reuse.

The following are several common methods for detecting the content of precious metal waste:

1. Chemical analysis method: Chemical analysis method is a commonly used method for detecting the content of precious metal waste. It is based on the principle of chemical reaction and determines the content of precious metals by analyzing the element content in the waste. Common chemical analysis methods include titration, electrochemical analysis, and photometry. These methods can accurately determine the content of precious metals in waste, but require complex sample pre-treatment and experimental operations, which are time-consuming and labor-intensive.

2. Spectral analysis method: Spectral analysis method is another common method for detecting the content of precious metal waste. It utilizes precious metal elements to absorb or emit specific light characteristics within a specific wavelength range, and is analyzed and measured through spectroscopic instruments. Common spectral analysis methods include Atomic absorption spectroscopy (AAS), Inductively coupled plasma emission spectrometry (ICP-OES) and mass spectrometry. Spectral analysis has the advantages of high accuracy and sensitivity, and can simultaneously determine the content of multiple precious metal elements.

3. Instrumental chemistry method: Instrumental chemistry method is to use specific instruments and equipment to detect the content of precious metal waste. Common instruments include electron microscope (SEM), X-ray fluorescence (XRF) and Scanning electron microscope energy spectrometer (EDS). These instruments can analyze the surface morphology, elemental composition, and structural characteristics of waste materials to determine the content of precious metals.

4. Physical measurement method: Physical measurement method determines the content of precious metal waste through changes in physical properties. For example, estimating the content of precious metals based on their density, magnetism, conductivity, and other characteristics. This method is usually used for preliminary screening and rapid estimation of precious metal content, but its accuracy is low and needs to be validated in conjunction with other analytical methods.

What are the methods used by Dingfeng Precious Metal Recycling to detect the content of precious metals in precious metal waste recycling? All answers to the questions.