Articles by Topic "Spectrum pure"

1. What is Spectrum Pure Grade? A Complete Guide
   posted this at Nov 11, 2025

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   In China’s reagent system, “Spectrum pure” (SP) is a purpose-specific purity class used for spectroscopy. The label appears in the national classification standard GB/T 37885-2019 “Chemical reagent—Classification” as one of the recognized categories alongside high-purity, primary ...