For PCR
聚合酶链式反应（Polymerase Chain Reaction,PCR）对原料纯度与杂质背景高度敏感。即便是痕量的核酸酶、金属离子、内毒素或有机杂质，都可能显著抑制聚合酶活性，导致扩增灵敏度下降、特异性减弱或结果不可重复。
阿拉丁试剂的规格、级别和纯度
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阿拉丁试剂的规格、级别和纯度
探索阿拉丁生物化学品和试剂的详细规格、分级标准和纯度水平。确保科学研究的可靠性和性能。
392 篇文章
For PCR
Polymerase chain reaction (PCR) is highly sensitive to raw-material purity and impurity background. Even trace levels of nucleases, metal ions, endotoxin, or organic contaminants can markedly inhibit polymerase activity, lowering sensitivity and specificity and undermining reproducibility.
Inside the “For Chiral Derivatization” Grade
A for chiral derivatization reagent is a derivatization reagent purpose-built and application-qualified for stereochemical measurements—e.g., ee (enantiomeric excess)/er (enantiomeric ratio) determination and, where applicable, absolute-configuration assignment.(ee/er quick card: if R:S = 70:30 ...
走进“用于手性衍生化（for chiral derivatization）”等级
用于手性衍生化试剂是指：为立体化学测定（如ee（对映体过量）/er（对映体比）测量、绝对构型判定）而专设并经应用级验证的衍生化试剂。（ee/er小卡片：若 R:S= 70:30（er），则ee=|70−30|/100 ×100% =40%（R过量）。）其通过与手性分析物（胺、醇、羧酸、氨基酸、多元醇等）发生共价反应，将原本互为对映体的 R/S 转化为一对非对映体衍生物，使之在非手性系统（普通 ...
Benchmark Reagents (PT): A Practical Guide
Benchmark reagent (PT; Benchmark reagent) is a China-market grade label indicating a reagent suitable for use as a primary standard. Its core purpose is to prepare standard solutions directly or standardize titrants (establish/verify concentration or factor), while providing metrological ...
基准试剂（PT）：实用指南
基准试剂（PT，Benchmark reagent）是在中国市场分级体系中用于指示“适合作为原级标准（primary ...
AR（Analytical Reagent）grade — a practitioner’s guide
AR (Analytical Reagent) is a vendor-defined label historically used for chemicals intended for general analytical use in laboratories. It signals a higher level of control over impurities than “technical” or “chemically pure (CP)” grades, and typically provides more detailed specifications and a ...
AR（Analytical Reagent，分析试剂）— 实用指南
AR (Analytical Reagent，分析试剂)是一种由供应商自行定义的标签，历史上用于标识适用于一般分析用途的化学品。与 “technical（技术级）” 或 CP (chemically pure，化学纯) 等级相比，AR 通常意味着更严格的杂质控制，并为每个批次提供更详细的规格与分析证明/批次检验证书 (Certificate of Analysis, CoA)。但需要注意，AR 并非单一通行的全球标准。在实际使用中，各家供应商都会公布其AR等级的覆盖范围，并在适用时说明某一产品是否额外符合ACS Reagent ...
Inside “Purified Grade”: Origin, Specifications, and Lab Applications
“Purified” is a vendor-defined grade for chemicals of good/general laboratory quality used where no official standard (e.g., ACS, USP, FCC) is required. It’s commonly used for inorganics and teaching/general lab work; impurity limits are looser or not harmonized across suppliers. It is not ...
危险品化学品经营许可证（带存储）