lntended Use
This RM is intended for use in a
laboratory as a calibration and qualitycontrol standard or in method development for analyticaltechniques.

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

Traceability
The balances used for gravimetricmeasurements are calibrated withweights traceable to the nationalstandards (DKD).The calibration of

the balances is verified daily internallyand annually by an external accreditedcalibration service.Chromatographicmethods are traceable to the
lnternational System of Units (SI).

Homogeneity
Random replicate samples of the finalpackaged RM have been analysed toprove homogeneity compliant withISO 17034.

Storage
The RM should be stored in theoriginal sealed container at theindicated temperature.

lnstructions for use

lt is recommended to use 1 mg as theminimum sample size and if less
material is used, to increase the
certified uncertainty by a factor of twofor half sample and four for a quarterof sample. If storage after opening isnecessary, the RM should be tightlyclosed and kept from light and
moisture. lf the RM was in a sealedampoule, it should be transferred to avial with minimum head space. Visitthe support section of our websitelgcstandards.com for a series ofDr. Ehrenstorfer Tech Tip videos andfrequently asked questions.