碧云天的试剂按照等级主要分成Reagent grade、BioReagent、BioPlus和BioPremium这4个级别，具体的描述请参考下表。一些特殊用途的试剂级别会给予特定的描述，例如RNase free、DNase free、Protease free、Cell Culture Grade、Electrophoresis Grade、Molecular Biology Grade等。

等级	等级描述
Reagent grade	该级别试剂为常规试剂，试剂纯度一般≥95%
BioReagent	该级别试剂为基础生物级试剂，通过特定的生物应用测试，例如分子生物学检测、细胞培养检测、动物研究等。BioReagent等级和Sigma公司的Bioreagent等级基本一致。
BioPlus	该级别试剂为高等级生物试剂，通过特定的生物应用测试和严格的痕量金属等测试，比如杂交瘤(hybridoma)、鼠胚(mouse embryo)等检测。BioPlus等和Sigma公司的BioXtra等级基本一致。
BioPremium	该级别试剂是碧云天提供的生命科学领域的最高等级试剂，生产过程和成品测试极为严格，确保碧云天的最高级品质。生物相关的检测指标，如活性检测、痕量重金属检测、痕量杂质酶检测、蛋白含量检测等，都会在产品的技术指标说明中相应标识。有些产品的检测项自还会包括细胞培养、凝胶电泳纯度或其它实际应用测试。BioPremium等级和Sigma公司的BioUltra等级基本一致。

 

Grades	Definition
Reagent grade	≥95% for general laboratory use.
BioReagent	Base grade products for life science, suitability tested for specific applications such as molecular biology, cell culture or animal study.
BioPlus	High grade products for life science. Stringent testing protocols may include trace metal analysis and specialized suitability testing, such as hybridoma or mouse embryo. Includes application-specific formulations, such as tablets, pre-mixed powders and prepared solutions.
BioPremium	Finest quality products for life science from Beyotime, with the most stringent testing protocols and highest purity. Superior manufacturing methods and product specific testing protocols are designed to ensure quality to our highest standard. Tests may include, but are not limited to, purity by gel electrophoresis, trace metal testing and application testing.