China has reported a breakthrough in rare‑earth testing. A SAMR‑designated key laboratory for rare‑earth product testing and traceability at Jiangxi University of Science and Technology developed several detection techniques, notably an inductively coupled plasma tandem mass spectrometry (ICP‑MS/MS) method that directly measures trace rare‑earth impurities in high‑purity materials. The ICP‑MS/MS approach overcomes matrix‑interference limits and the need for prior matrix separation, lowers detect

China has reported a breakthrough in rare‑earth testing. A SAMR‑designated key laboratory for rare‑earth product testing and traceability at Jiangxi University of Science and Technology developed several detection techniques, notably an inductively coupled plasma tandem mass spectrometry (ICP‑MS/MS) method that directly measures trace rare‑earth impurities in high‑purity materials. The ICP‑MS/MS approach overcomes matrix‑interference limits and the need for prior matrix separation, lowers detection limits, and delivers higher sensitivity, accuracy and faster turnaround, providing stronger technical support for rare‑earth product quality control.