Version 10.0 – July 2014
17
Elemental Analysis Materials
A supply of dibenzothiophene of adequate purity was obtained, from which aliquots
were sub-sampled and sealed in vials.
This material is a micro-analytical standard intended for use in checking the
performance of elemental analysers.
Certified Value
Sulfur ......................... 17.6 ± 0.4 % m/m
Acetanilide was purified by repeated fractional recrystallisation from the melt. The
resulting product was ground, sieved, tumbled and rolled on a laboratory mill to
homogenise.
This material is intended for use in the calibration of instruments used in elemental
analysis.
Certified Values
Carbon ............................. 71.09 % m/m
Hydrogen ............................ 6.71 % m/m
Nitrogen ............................ 10.36 % m/m
Benzoic acid was purified by repeated fractional recrystallisation from the melt. The
resulting product was ground, sieved, tumbled and rolled on a laboratory mill to
homogenise.
This material is intended for use in the calibration of instruments used in elemental
analysis.
The theoretical composition has been used as the certified value.
Certified Value
Oxygen ............................. 26.20 % m/m
Pure 4-bromobenzoic acid was ground, sieved, tumbled and rolled on a laboratory
mill to homogenise.
This material is intended for use in the calibration of instruments used in elemental
analysis.
The theoretical composition has been used as the certified value.
Certified Value
Bromine ............................ 39.75 % m/m
Pure 2-iodobenzoic acid was ground, sieved, tumbled and rolled on a laboratory mill
to homogenise.
This material is intended for use in the calibration of instruments used in elemental
analysis.
The theoretical composition has been used as the certified value.
Certified Value
Iodine ............................... 51.17 % m/m
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