化工产品纯度就是原料的纯净程度，相对来说也是指原料的含杂程度。纯度越高的原料所含的杂质种类和数量越少。化工原料按纯度可分为工业纯和试剂纯二大类。而试剂纯的原料按纯度高低又可分为四级。
试剂纯级 reagent pure grade
优级纯试剂 guaranteed reagent ; GR
化学纯试剂 CP
分析纯试剂 AR ; [试剂] analytical reagent
超纯试剂 ultra pure
高纯及超纯试剂 Pure and ultra-pure reagent
高纯试剂 reagent of high purity ; High-purity reagent
等离子体质谱纯级试剂 ICP-Mass Pure Grade
光谱纯试剂 spectroscopic pure
原子吸收光谱纯级试剂 AA Pure Grade
所有化学试剂均为分析纯，且使用前未经纯化。
All chemicals were of analytical grade and used without further purification.
提供了处理工艺，并且把自制品与分析纯试剂及理论计算值进行了比较，三者基本在同一质量水平上。
Comparing the analysis of self - made product with the a . r . regent and calculated result , the three results are on the same level.
产量相对较少和较纯态的化学品，例如医药和生物制品、香料、照相药品和试剂化学品。
A chemical produced in comparatively small quantities and in a relatively pure state. Pharmaceutical and biological products, perfumes, photographic chemicals, and reagent chemicals are examples.
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