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Ultra
Purity Solvents UpS ™
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The Ultimate Quality for Hyphenated
Techniques
Whilst the purity levels of
ROMIL-SpS™
solvents are suitable for most instrumental applications there are some
high-sensitivity techniques which demand even greater purity. Analytical
instrumentation can now detect substances at such low concentrations that
were previously considered undetectable. This is especially true in
environmental analysis where detection of trace amounts of pollutants is
now the routine.
Hyphenated techniques in
particular place a great burden on the purity of the solvents. These
double or triple detection systems require a solvent quality matched to
the requirements of all the configured detectors.
ROMIL-UpS™ Ultra Purity Solvents have been
developed to address this requirement. Purification techniques are more
exacting and each batch is carefully use-tested to ensure the best
possible performance. Not only is the original purity controlled but also
the actual purity when opened some time later. This is done by selection
of suitable raw material, purification process and shelf life of final
product based on many years experience as the acknowledged leader in this
field.
Because no matter how pure
the solvent, it will eventually degrade over time. Such degradation
products may become apparent during use, either as additional peaks, or
through unwanted and unexpected reaction with the sample. At ROMIL we have
found that the purer the solvent starts out the longer its useful
'stability'. Selection of an appropriate stabiliser, as in
dichloromethane, can also enhance such stability. Our expertise is
distilled into every bottle of ROMIL-UpS™ solvent which means a greater
assurance of quality results, first time, every time.
Ultra Purity Acids and Bases
UpA™
A Part Per Trillion -
Like a Leaf in a Forest!
To visualise a part in a trillion,
imagine a single leaf in a forest. That's the goal to which
ROMIL-UpA™ Ultra
Purity Acids and Bases are purified. And when modern inorganic
instrumental techniques such as ICP-MS and voltammetry can routinely
detect to these levels, trace analysts need the purest reagents available.
To produce these ultra-pure
products, highly purified acids are redistilled at sub-boiling
temperatures until most metallic impurities become undetectable, even
after a 50-fold concentration. However, some elements such as first row
transition metals like Cu, Fe, Ni and Zn as well as others such as Al, Ca
and Na are so widespread in the environment that they present a real
challenge. ROMIL-UpA™ acids
presently contain these elements below 100 ppt and research is continuing
with 1 ppt as the ultimate aim.
To ensure that such low
levels at time of manufacture are maintained, ROMIL-UpA™ acids are bottled under strict clean
room conditions into pre-cleaned Teflon bottles. These bottles have been
leached in successively cleaner acidic baths to reduce bottle blanks to
negligible levels. Storage tests over a two year period have indicated no
detectable changes in concentration of metallic impurities.
All ROMIL-UpA™ acids and reagents are supplied with
a guaranteed Certificate of Analysis included in the price. This details
the batch results of generally more than 60 elements as determined by
ICP-MS and GFAAS.
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