Semi-automatic mineral analyzer

The core pain points of precious metal ore detection

1. Extremely low content：

• Rock gold deposit: Au is usually 1-10 g/t (≈ 1-10 ppm)

• Sand gold mine: possibly as low as 0.1 g/t

• Platinum group elements (Pt, Pd, etc.): mostly below 1 ppm

2. Multiple interfering factors：

• Symbiotic minerals (such as gold encapsulated in pyrite)

• Matrix effect (signal overlap in copper silver co occurring minerals)

Handheld XRF spectrometer

The rapid screening of gold (Au), silver (Ag), and other minerals in the wild typically has a detection limit of 5-50 ppm.

Cannot directly detect platinum group elements (such as Pt and Pd require high-performance models).

Portable, lossless, and fast (10 seconds/point).

Operation guide for avoiding pitfalls

1. sample preparation：

• XRF detection surface needs to be polished to 400 mesh or above

• Avoid using lead containing polishing agents (which can interfere with Au signals)

2. Calibration verification：

• Calibrate daily with standard samples (such as GSA-8A gold standard sample)

• When the detection value approaches the device detectionlimitIt must be retested in the laboratory

3. data interpretation：

• The 'Au' peak of handheld XRF needs to exclude Hg interference (commonly seen in antimony gold mines)