Investigation of hydrogen cyanide generation from the cyanoacrylate fuming process used for latent fingermark detection.
Summary of "Investigation of hydrogen cyanide generation from the cyanoacrylate fuming process used for latent fingermark detection."
Cyanoacrylate fuming is one of the most common techniques employed for the detection of latent fingermarks on non-porous surfaces such as plastic and glass. The technique is generally applied by exposing items of interest to the vapours generated by heating a suitable quantity of commercial cyanoacrylate adhesive. In this study, the potential for highly toxic hydrogen cyanide (HCN) to be generated from the overheating of cyanoacrylate was investigated. Two commercial cyanoacrylate adhesives and two quantitative methods for the determination of HCN were employed: (i) the sodium picrate method; and (ii) the picrate-resorcinol method. (13)C nuclear magnetic resonance (NMR) analysis was used to confirm the presence of cyanide. In addition, the thermal decomposition of cyanoacrylate was studied using simultaneous thermogravimetric and differential thermal analysis (TGA-DTA). It was determined that detectable and quantifiable amounts of HCN were generated from the thermal decomposition of cyanoacrylate monomer and polymer at temperatures as low as 200°C. Using an optimised picrate-resorcinol method, it was shown that around 10μg of HCN could be generated from the heating of 1g of cyanoacrylate monomer at 200°C. For one of the adhesives tested, this increased to above 100μg of HCN when 1g of cyanoacrylate monomer was heated at 280°C. Recommendations are provided that, if followed, should ensure that the cyanoacrylate fuming process can be safely applied with minimal risk to the operator.
Centre for Forensic Science, University of Technology Sydney, PO Box 123, Broadway, Sydney NSW 2007, Australia.
This article was published in the following journal.
Name: Forensic science international
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21737219
- DOI: http://dx.doi.org/10.1016/j.forsciint.2011.06.004
Extracts of spinach, maize and barley contain an enzyme which catalyses the formation of hydrogen cyanide from glyoxylate and hydroxylamine. The enzyme is dependent upon ADP and a divalent cation such...
Currently, there is an enormous amount of energy available from salinity gradients, which could be used for clean hydrogen production. Through the use of a favorable oxygen reduction reaction (ORR) ca...
The chelated-iron process is among the most promising techniques for the hydrogen sulfide (H2S) removal due to its double advantage of waste minimization and resource recovery. However, this technolog...
Background: Hydrogen cyanide possesses a high acid-dissociation constant of 9.14, favoring its vaporization and depletion from the culture media at physiological pH, which may cause the cyanide toxici...
We evaluated the adhesive strength of ethyl-2-cyanoacrylate and compared the findings with those of traditional monofilament synthetic sutures. We also investigated the factors that could affect the e...
People who has been in a fire accident have been shown often to be cyanide poisoned as well as poisoned with carbon monoxide(CO). According to recommendations from the Danish Health Agency...
The recent practice guideline recommends endoscopic injection of cyanoacrylate (GVO) is the preferred method to treat acute gastric variceal bleeding. The rebleeding rate remains high foll...
Compare VBL and cyanoacrylate injection (CI) in the treatment of EV in patients with advanced liver disease regarding eradication, bleeding, mortality, complication and recurrence rates.
The purpose of this study was to test the hypothesis by comparing the efficacy of cyanoacrylate injection (GVO) and band ligation (GVL) in the treatment of acute GVH in liver cirrhotic pat...
The purpose of this study is to determine whether cyanoacrylate tissue adhesive is as effective as polyglactin 910 suture for surgical closure of cardiac device pockets.
Medical and Biotech [MESH] Definitions
Hydrogen cyanide (HCN); A toxic liquid or colorless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials.
Hydrofluoric acid. A solution of hydrogen fluoride in water. It is a colorless fuming liquid which can cause painful burns.
Organic compounds containing the -CN radical. The concept is distinguished from CYANIDES, which denotes inorganic salts of HYDROGEN CYANIDE.
Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It is distinguished from NITRILES, which denotes organic compounds containing the -CN radical.
Interactional process combining investigation, discussion, and agreement by a number of people in the preparation and carrying out of a program to ameliorate conditions of need or social pathology in the community. It usually involves the action of a formal political, legal, or recognized voluntary body.