Document Detail

Determination of low nanogram/millilitre levels of volatile organic compounds in on-purpose and by-product hydrochloric acids.
MedLine Citation:
PMID:  8871128     Owner:  NLM     Status:  MEDLINE    
Hydrochloric acid (HCl) is used in the food industry as a processing aid in the manufacture of certain foods. HCl is manufactured, either directly from inorganic sources, i.e. "on-purpose' or indirectly as a by-product from the production of organic compounds generally intended for non-food applications. By-product HCl potentially may contain traces of the manufactured product, its precursors, and other reaction by-products. Many of the potential contaminants are volatile organic compounds (VOCs) such as vinyl chloride and benzene. A study was conducted to determine whether there were differences between the levels of VOCs found in HCl samples collected from two on-purpose HCl manufacturers and two by-product HCl manufacturers. Process water used to manufacture the HCl also was analysed. Twenty-nine VOCs were determined by purge- and-trap concentration and capillary gas chromatography/mass spectrometry. Of these, nine were found in the process water and in both the by-product and on-purpose HCl samples at total VOC levels of less than 116 ng/ml. The levels of total VOCs identified in the two on-purpose HCl samples were 58 and 80 ng/ml; the levels of total VOCs identified in the two by-product samples were 41 and 115 ng/ml. The process water appeared to be the source of most of the contaminants. These results show that the levels of VOCs found in the two types of acid are comparable.
P J Nyman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Food additives and contaminants     Volume:  13     ISSN:  0265-203X     ISO Abbreviation:  Food Addit Contam     Publication Date:    1996 Aug-Sep
Date Detail:
Created Date:  1997-01-07     Completed Date:  1997-01-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8500474     Medline TA:  Food Addit Contam     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  705-15     Citation Subset:  IM    
US Food and Drug Administration, Division of Product Manufacture and Use, Washington, DC 20204, USA.
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MeSH Terms
Food Handling*
Gas Chromatography-Mass Spectrometry / methods*
Hydrocarbons / analysis*
Hydrocarbons, Halogenated / analysis
Hydrochloric Acid / analysis*
Reg. No./Substance:
0/Hydrocarbons; 0/Hydrocarbons, Halogenated; 7647-01-0/Hydrochloric Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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