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Offline curiouscat

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Assay percent in spec. without method being specified
« on: June 05, 2016, 04:22:06 AM »
I'm looking at a Flavoring Substance Spec. at the UN-Food & Agricultural Organization website which says "Assay min %" as 97%. (for Benzylcarbinyl butyrate)

But no method is specified. In such cases is there an implied method or protocol to be used?

http://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/924/

Offline AWK

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Re: Assay percent in spec. without method being specified
« Reply #1 on: June 05, 2016, 05:30:57 AM »
read: Online help  About the data  Analytical Methods (Volume 4)
for this FAO document (COMBINED COMPENDIUM OF FOOD ADDITIVE SPECIFICATIONS vol 4)
AWK

Offline curiouscat

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Re: Assay percent in spec. without method being specified
« Reply #2 on: June 05, 2016, 09:45:35 AM »
Thanks @AWK.

I did refer to that Volume but I still don't find guidance on the specific protocol to use for this assay. Perhaps I missed something. Did you have a specific page / section you wanted me to look at?

Offline Arkcon

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Re: Assay percent in spec. without method being specified
« Reply #3 on: June 05, 2016, 11:14:25 AM »
The method in question likely that s somewhere in the compendium in question, or in a related document.  Without the actual document in question, its hard to know where it is.  I'm not saying this is a difficult process, but if you want it to be quick and free, you may B expecting too much.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline AWK

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Re: Assay percent in spec. without method being specified
« Reply #4 on: June 05, 2016, 11:36:05 AM »
Document show different tests for this group of compounds, GC ist the most important.
AWK

Offline curiouscat

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Re: Assay percent in spec. without method being specified
« Reply #5 on: June 05, 2016, 12:24:27 PM »
The method in question likely that s somewhere in the compendium in question, or in a related document.  Without the actual document in question, its hard to know where it is.  I'm not saying this is a difficult process, but if you want it to be quick and free, you may B expecting too much.

OK. So what you are saying is that the method must be specified somewhere I just need to look harder. Will do.

It's an UN Org. So I expect it's free. e.g. Vol4 @AWK referred to is freely available on the site. Just doesn't contain the specific protocol info.

 But even if not I'm willing to pay for the protocol the way I do at ASTM / ISO etc. ; but I just don't see a link to buy either.

I'm used to seeing an assay value with a note / link to the test-protocol; the absence of any such hint here made me wonder if there's some default method obvious to people skilled in the art that I'm missing.

Offline AWK

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Re: Assay percent in spec. without method being specified
« Reply #6 on: June 05, 2016, 12:43:52 PM »
Page 191 Flavouring Agents - Assay
"For Gas Chromatographic analysis procedures see Gas Chromatography in the Section on
Analytical Techniques".
Link to complete volume 4: ftp://ftp.fao.org/docrep/fao/009/a0691e/a0691e.pdf
AWK

Offline curiouscat

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Re: Assay percent in spec. without method being specified
« Reply #7 on: June 05, 2016, 01:12:11 PM »
Page 191 Flavouring Agents - Assay
"For Gas Chromatographic analysis procedures see Gas Chromatography in the Section on
Analytical Techniques".
Link to complete volume 4: ftp://ftp.fao.org/docrep/fao/009/a0691e/a0691e.pdf

Thanks! So GC it is.

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