Docosanoic acid-methyl ester

CAS No.：929-77-1

Mol. Weight：354.61

Mol. Formula：C23H46O2

Storage Temp：4℃±4℃

Purity：99.44% (g/g)

Expanded Uncertainty U：0.30% (g/g)

Uncertainty

The certified valuels) and uncertaintyies) are determined in accordance with EURACHEM/CITAC Guide for Quantifying Uncertainty in Analytical Measurement, 3rd edition , with an 95% confidence level (k=2). Uncertainty isbased on theTotal Combined Uncertainty, including uncertainties of characterisation and stability testing. Stabilityvalues are based on real evidence opposed to simulation.

The producer certifies that this reference material meets the specification stated in this certificate until the expiry date,provided it is stored unopened at the recommended temperature herein. Product warranties for this reference material are set out in the terms and conditions of purchase.

Method of Characterisation

Purity = 100% - Assay impurities - Water content (KF)

Method of ldentification
EA,NMR,RT,IR,MS

Batch Information

Water Content: <0.10%(g/g) by Karl-Fischer-Titration (U(exp)= 0.14%(g/g)).

Intended Use

This RM is intended for use in a laboratory as a calibration and quality control standard or in method development for analytical techniques.

Safety

Proper precautions should be observed while handling. See Safety Data Sheet.

Traceability

The balances used for gravimetric measurements are calibrated with weights traceable to the national standards (DKD). The calibration of the balances is verified daily internally and annually by an external accredited calibration service. Chromatographic methods are traceable to the International System of Units (SI).

Homogeneity

Random replicate samples of the final packaged RM have been analysed to prove homogeneity compliant with ISO 17034.

Storage

The RM should be stored in the original sealed container at the indicated temperature

Instructions for use

It is recommended to use 1 mg as the minimum sample size and if less material is used, to increase the certified uncertainty by a factor of two for half sample and four for a quarter of sample. If storage after opening is necessary, the RM should be tightly closed and kept from light and moisture. If the RM was in a sealed ampoule, it should be transferred to a vial with minimum head space. Visit the support section of our website lgcstandards.com for a series ofDr. Ehrenstorfer Tech Tip videos and frequently asked questions.

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