Ethylene glycol

Formula：C2H6O2

Mol. Welght：62.07

CAS No.：107-21-1

Storage Temperature：20℃±4℃

Storage and handling：The RM should be stored in the original sealed bottle at the temperature given above.After use the bottle should be tightly closed and protected from moisture .

Purity：99.47% (g/g)

Expanded Uncertainty U= 0.71% (g/g)

The uncertainty of this standard is calculated in accordance with the lSO Guide 34 and EURACHEM/CITAC Guide - Quantifying Uncertainty in Analytical Measurement, Second Edition.The expanded uncertainty is U(exp)=u(RM)x k, where k is the coverage factor at the 95% confidence level (k=2). Uncertainty u(RM)is based on the combination of the uncertainties associated with each indvidual operation involved in the analysis of the product u(RM)=vu(char)²+u(bb)²+u(lts)²+u(sts)²; u(char) is the uncertainty of charactersation; u(bb) uncertainty of homogeneity test;u(lts) uncertaintyof stability test long-term; u(sts) uncertainty of stablitytest short-term.u(lts) and u(sts) are not incuded in the calculation as the stablity statement is based on real evidence opposed to simulation.

Minimum sample: 1 mg is recommended as the minimal sample amount.If less material is used it is recommended to increase the ceritfied uncertainty by a factor of two for half sample and a factor of four for a quarter of sample.
Intended use: Use this RM as calibrant for chromatography or any other analytical technique.

Analytical Data

Traceabity of dhromatography： To the intemational System of Units (SI).

Instrumert：GC/FID

Detectionc：FID

Column：Optima-5MS,0.25 um, 0.25 mm

lnj.-VolL：1μl

Flow：1.0 mL/min

Ret.Time：5.26min

lnjector：200°C

Initial Temp：40ºCfor 5 min

End Temp：200°C for 16 min

Gradient：15°C/min

Comment

Traceabity： The balances used are calibrated with weights traceable to the national standards (DKD）.

Calibnated dass A glassware is used for volumetric measurements.

Water Content：0.21% (g/g) by Karl-Fischer-Titration (U(exp) = 0.18% (g/g)).

Purity was determined by elemental analysis

ldentity：EA, NMR RT, IR, MS

Attachment: Exemplary chromatogram of given method

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