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Posted By Descarte
Maybe they should go in to the market of alternative / biofuels?
In the tests, a batch of the Co-op's low-calorie bitter lemon drink with a best before date of June 2006, had the highest benzene level of 28 ppb
In the UK, drinking water should have a benzene level of no more than one part per billion, WHO limits are 10ppb
Full story here and other products here:
http://news.bbc.co.uk/1/hi/health/4864226.stm
The other drinks with above WHO levels were:
Popstar's still sugar-free lemon and lime drink - best before 22 April - 17 ppb
Hyberry's no-added sugar blackcurrant squash - best before September - 12 ppb
Morrisons' no-added sugar pineapple and grapefruit crush - best before July - 11 ppb
Guess this is similar to the food dye scare that happened last year
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Posted By Robert K Lewis
The real misery is in the details of how this arises. Ascorbic acid, vitamin C to you and me, reacts with the preservative Sodium Benzoate to produce benzene among other substances. It is a well known reaction in the industry as a problem but they are still added to drinks. This happens even though the matter has occurred previously and similar levels were found.
Feet and shooting oneself come to mind, Just what is happening in the drinks industry.
Bob
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Posted By Stephen D. Clarke
I think its overhyped - Is it significant when every time you fill the car with fuel you're breathing petrol vapour containing anything from 10,000ppm to 30,000ppm benzene which you'd think would lead to much higher levels in the bloodstream than a drink containing a few ppb benzene?
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Posted By Robert K Lewis
Stephen
Where are you getting your figures from? I've tested the engineers callibrating the forecourt pumps for weights and measures purposes. They handle significant amounts in open air and come nowhere near these. If they had there would have been significabnt concerns and cessations of work.
Remember also that many of these drinks are designed for children who tend not, I would guess, to fill fuel tanks. Do we really want the additional risk even at a very low level. I remember my days as a benzene worker with the regular blood tests simply because it was a recognised initiator of Lukaemeia and other cancers.
The point is that it does not need to be there at all.
Bob
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Posted By Descarte
I was under the impression bezene levels in petrol/diesel was circa 500ppm
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Posted By Stephen D. Clarke
I thought from previous reading years ago that petroleum can legally contain up to 5% benzene that is 50,000ppm, it is a volatile solvent, if it's present in the liquid spirit one would expect it to evaporate readily. In the US I think benzene is removed to bring the max level down to 1% but this is costly. The HSE document below appears to back up my thoughts re. that benzene is in petrol at % levels.
http://www.hse.gov.uk/LAU/lacs/57-4.htm
A New Scientist report in 2004 linked childhood leukaemia with proximity to service stations.
http://www.newscientist.com/article.ns?id=dn6301
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Posted By Robert K Lewis
There are other far more volatile components of petrol. The partial vapour pressures will dictate the actual levels in air at equilibrium.
The worst case testing I have seen is for peak figures of between 100ppb and 4000ppm during refuelling depending on wind, site layout and temperatures around 28-30 celsius. These peak figures lasted less than 30 seconds.
Bob
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Posted By Smurfer
Considering the WEL for benzene is 1ppm, I would be VERY surprised if I was breathing in 50,000ppm at a filling station (especially as I use diesel...)!!!!
Me thinks the accuracy of your data is somewhat awry.
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Posted By Stephen D. Clarke
Thats my point really - benzene is a substance banned in industry except for R&D, low WEL, but it's present in petrol at such a high level i.e. 2-3% or 20,000-30,000ppm. Despite the fact that this level does not translate linearly into same conc. in the vapour it still yields a relatively high level in the vapour, it is a volatile substance benzene 74.6mmHg, pentane 124mmHg, hexane 132mmHg at 20C. Is there any other banned substance that is treated in such a cavalier fashion simply because it would be too costly to remove?
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Posted By Robert K Lewis
Benzene is not banned and is widely used for back extraction and other industrial refining processes. Like all organic solvents it has its problems and low permitted exposures. All petrol contains around 2-5% of benzene. The exposure of even 4000ppm for a maximum 30 seconds once or twice per week is still not high. These figures were not taken in the breathing zone but 300mm from the filler cap.
Bob
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Posted By Robert K Lewis
Stephen
If you look at the schedule 2 entry for benzene it states:
Column 1
Benzene and any substance containing benzene in a concentration equal to or greater than 0.1 per cent by mass, other than -
(a) motor fuels covered by Council Directive 85/210/EEC (OJ No. L96, 3.4.85, p. 25);
(b) waste covered by Council Directives 75/442/EEC (OJ No. L194, 25.7.75, p. 39), as amended by Council Directive 91/156/EEC (OJ No. L78, 26.3.91, p. 32), and 91/689/EEC (OJ No. L377, 31.12.91, p. 20).
Column 2
Use for all purposes except -
(a) use in industrial processes; and
(b) for the purposes of research and development or for the purpose of analysis
This only amounts to a ban for domestic use and in general commercial premises. The significant use of benzene is not prohibited in industrial manufacture, laboratories and similar facilities. The use of the word ban has emotive content and makes it appear that there is a total embargo on the use of the material. It is one of the words that we need to consider carefully before we use it.
That said I think it is totally right to say that there should be a BAN on the mixing of two substances in a soft drink creating a possibility of causing an unnecessary exposure to benzene, it is still a carcinogenic material and its use and exposure are rightly controlled.
Bob
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Posted By garyh
I detect a "bad chemical on the loose" scare here. The media loves to scaremonger and gives hysterical coverage to "chemicals".
We as professionals should not fall into the same trap.
In my view this is a simple COSHH issue ie you assess routes of exposure, actual exposure data and control measures (and so on).
I feel certain that the overall risk from Benzene in soft drinks and forecourts is acceptably low.
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Posted By Robert K Lewis
Gary
The imbibers of the benzene are not at work so I fail to see how COSHH applies. This is a food and consumer protection issue. Yes the press have created a storm over it but the issue remains that the creation of benzene in-situ can be avoided but the industry has continued as it has previously done and mixed the two substances. No sodium benzoate = no benzene problem.
Bob
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Posted By Paul Leadbetter
An industry response I heard early in the scare blamed it on the consumers whose needs the industry feel compelled to satisfy, apparently. I bet those same consumers would have had a different opinion if the problem had been explained to them.
Paul
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Posted By Jonathan Breeze
Sorry Paul, run that one by me again?
It is the consumers fault because they demanded that the suppliers put ingredients in their drinks that react together to form benzene.
Nice - I'd have liked to see the minutes of that focus group!
Do you have a source for that claim?
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Posted By Paul Leadbetter
Jonathan
It was said by an industry representative, as he was interviewed, probably on the BBC, when the story first broke.
Paul
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Posted By Jonathan Breeze
Is he still the industry representative I wonder?
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