evaluation of certain food additives - libdoc.who.int - World Health ...

3.2.2 Ethyl lauroyl arginate
The Committee was requested to review the test method for L-arginine·HCl
and ethyl arginate·2HCl in the specifications for ethyl lauroyl arginate. The
existing specifications were revised at the current meeting.
3.2.3 Glycerol ester of wood rosin
At the present meeting, the Committee decided that the specifications for
GEWR developed at its forty-sixth meeting (Annex 1, reference 122) should
be reconsidered in connection with the evaluation of the two new rosin esters,
GEGR and GETOR.
The Committee noted that the existing specifications for GEWR contain a
chromatographic method intended to distinguish among the rosin esters based
on the identification of their resin alcohols, but recognized that both the chromatographic
method and the sample chromatograms of the alcohols are quite
old (mid-1980s). The Committee considered that it is likely that the method
is outdated and that the chromatograms no longer represent products currently
in commerce. The Committee received information that the original method
has been updated since the specifications for GEWR were published, but did
not receive the updated method. Data submitted on the resin acid composition
of different batches of glycerol esters of rosins in commerce do not generally
support the relative proportions of resin alcohols considered to be characteristic
of the different rosin esters, as given in the gas chromatographic
procedure in the monograph for GEWR.
The existing specifications for GEWR were revised to include a lower limit
for lead and the sulfur test as an identity criterion to differentiate between
GEWR and GETOR and to remove the purity test for hydroxyl number and
the identification test “Gas chromatography of resin alcohols and glycerol”.
The specifications were made tentative pending the submission of infrared
spectra that correspond to the commercially available products, data on the
resin acid composition obtained with updated chromatographic techniques,
and additional information on methods that enable the identification of the
individual rosin esters and their differentiation. This information should be
submitted by the end of 2010.
3.2.4 Nisin preparation
Nisin preparation was on the agenda at the request of the fortieth session of
CCFA (7) to clarify the existing specifications prepared by the Committee at
its sixty-eighth meeting (Annex 1, reference 187).
The Committee discussed the title of this monograph, because it is inconsistent
with that used in the INS list, where it is given simply as “nisin”. This is
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