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.
1. Arbutin(CAS No. : 497-76-7),Nicotinamide(CAS No. : 98-92-0),Raspberry Ketone Glucoside(CAS No. : 38963-94-9) and 4-Butylresorcinol(CAS No. : 18979-61-8) are calculated by the peak area at 230nm.(熊果苷(CAS No. : 497-76-7)、烟酰胺(CAS No. : 98-92-0)、覆盆子酮葡糖苷(CAS No. : 38963-94-9)和4-正丁基间苯二酚(CAS No. : 18979-61-8)是根据230nm波长处的峰面积计算的。)2.Magnesium Ascorbyl Phosphate(CAS No. : 113170-55-1),Ascorbyl Glucoside(CAS No. : 129499-78-1),Kojic Acid(CAS No. : 501-30-4),3-O-Ethyl-L-ascorbic Acid(CAS No. : 86404-04-8) ,Potassium Methoxysalicylate (CAS No. : 152312-71-5) and Dipotassium Glycyrrhizinate(CAS No. : 68797-35-3) are calculated by the peak area at 250nm.(维生素C磷酸酯镁(CAS No. : 113170-55-1)、抗坏血酸葡糖苷(CAS No. : 129499-78-1)、曲酸(CAS No. : 501-30-4)、3-O-乙基抗坏血酸醚(CAS No. : 86404-04-8)、甲氧基水杨酸钾(CAS No. : 152312-71-5)和甘草酸二钾(CAS No. : 68797-35-3) 根据250nm波长处的峰面积计算的。)
This RM is intended for use in a laboratory as a calibration and quality control standard or in method development for analytical techniques.
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.
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.
Random replicate samples of the final packaged RM have been analysed to prove homogeneity consistent with ISO 17034.
The RM should be stored in the original sealed bottle at the indicated temperature.
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