Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts

ANFO, a commercial explosive consists of mixture of fuel and oxidizer, none of which is classified as explosive. ANFO is usually used in construction, quarrying and mining works but sometimes it is identified as one of the most common explosion found in a crime scene. They are often mixed at diff...

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Main Author: Phang, Cheah Chaw
Format: Monograph
Language:English
Published: Pusat Pengajian Sains Kesihatan, Universiti Sains Malaysia 2011
Subjects:
Online Access:http://eprints.usm.my/52662/1/CHEAH%20CHAW%20PHANG-24%20pages.pdf
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author Phang, Cheah Chaw
author_facet Phang, Cheah Chaw
author_sort Phang, Cheah Chaw
collection USM
description ANFO, a commercial explosive consists of mixture of fuel and oxidizer, none of which is classified as explosive. ANFO is usually used in construction, quarrying and mining works but sometimes it is identified as one of the most common explosion found in a crime scene. They are often mixed at different ratio by a non-standard user during explosion. Therefore, the objective of this project is to serve as a preliminary study to investigate how far ANFO at different mixing ratio can travel after the blasts. Five different mixing proportions of AN and FO (94:6, 90:10, 80:20,60:40 and 50:50) were used in this studies. Six selected non-absorbent surfaces commonly found at an explosion scene were placed at the distance of 5 m, 7 m and 9 m radius from the seat of blast. Residues travelled on selected surfaces were collected and analyzed using GC-MS. As a result, the FO residues can travel as far as 7 meter with the idea ANFO mixture of94:6 by weight (500 g AN and 38.35 mL FO) during blasting. When improper ANFO mixture of 50:50 by weight (500 g AN and 600.96 mL FO) was used, explosion did occur but FO found splashed and scattered around the crater mark. Thus, the extent of FO residues travel to some distances after the blast depends upon the proportions and quantities of ANFO.
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spelling usm.eprints-526622022-05-31T03:58:54Z http://eprints.usm.my/52662/ Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts Phang, Cheah Chaw RA0421 Public health. Hygiene. Preventive Medicine ANFO, a commercial explosive consists of mixture of fuel and oxidizer, none of which is classified as explosive. ANFO is usually used in construction, quarrying and mining works but sometimes it is identified as one of the most common explosion found in a crime scene. They are often mixed at different ratio by a non-standard user during explosion. Therefore, the objective of this project is to serve as a preliminary study to investigate how far ANFO at different mixing ratio can travel after the blasts. Five different mixing proportions of AN and FO (94:6, 90:10, 80:20,60:40 and 50:50) were used in this studies. Six selected non-absorbent surfaces commonly found at an explosion scene were placed at the distance of 5 m, 7 m and 9 m radius from the seat of blast. Residues travelled on selected surfaces were collected and analyzed using GC-MS. As a result, the FO residues can travel as far as 7 meter with the idea ANFO mixture of94:6 by weight (500 g AN and 38.35 mL FO) during blasting. When improper ANFO mixture of 50:50 by weight (500 g AN and 600.96 mL FO) was used, explosion did occur but FO found splashed and scattered around the crater mark. Thus, the extent of FO residues travel to some distances after the blast depends upon the proportions and quantities of ANFO. Pusat Pengajian Sains Kesihatan, Universiti Sains Malaysia 2011 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/52662/1/CHEAH%20CHAW%20PHANG-24%20pages.pdf Phang, Cheah Chaw (2011) Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts. Other. Pusat Pengajian Sains Kesihatan, Universiti Sains Malaysia. (Submitted)
spellingShingle RA0421 Public health. Hygiene. Preventive Medicine
Phang, Cheah Chaw
Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title_full Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title_fullStr Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title_full_unstemmed Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title_short Identification of fuel oil in non-absorbent surfaces in a site of ANFO blasts
title_sort identification of fuel oil in non absorbent surfaces in a site of anfo blasts
topic RA0421 Public health. Hygiene. Preventive Medicine
url http://eprints.usm.my/52662/1/CHEAH%20CHAW%20PHANG-24%20pages.pdf
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