This certificate is designed in accordance with ISO 17034 and ISO Guide 31. This reference material
(RM) was designed,produced and verified in accordance with ISO/IEC 17025, ISO 17034 and a registered
quality management system ISO 9001.
Product Name(产品名称)3-Methyl-quinoxaline-2-carboxylic acid in Methanol,100μg/mL(甲醇中喹乙醇代谢物MQCA)
Part Number(产品编号)91071GA
Lot Number(产品批号)-
CAS No.74003-63-7
Mol. Formula(分子式)C10H8N2O2
Mol. Weight(分子量)188.18__________
Storage Temp(存储条件)(2-8)℃ 冷藏(2~8)℃
Transportation(运输条件)Normal temperature transportation(常温运输)
QC Test Results
Item
Test Results
Analysis method(分析方法)
HPLC/DAD
Concentration(浓度)
100μg/mL
Relative Expanded Uncertainty(k=2)(相对扩展不确定度)
3%
Expiry Date(失效日期)
2026-Mar-05
Uncertainty
The certified value(s) and uncertainty(ies) are determined in accordance with ISO 17034 with an 95%
confidence level (k=2). Uncertainty is based on the Total Combined Uncertainty, including
uncertainties of preparation, purity of neat materials, homogeneity, stability testing.
Traceability
The balances used for gravimetric measurements are calibrated with weights traceable to the national
standards. The calibration of the balances is verified annually by an external accredited
calibration service. This analysis method has been verified using an approach consistent with ISO 17034:2016 & ISO 17025:2017.