The potential of chitosan-tripolyphosphate microparticles in the visualisation of latent fingermarks

Ezzeddin M A Hejjaji, Alan M. Smith, Gordon A. Morris

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Chitosan (CS) is a cationic polymer with excellent film, gel and particle-forming properties. This polymer has been investigated widely for its potential in the development of food and drug delivery systems and pharmaceutical applications, however it has not generally been considered in forensic applications for example fingerprints (fingermarks). Fingerprints are a very common form of physical evidence. The most commonly used procedure for revealing the ridge pattern is powder dusting, which relies on the mechanical adherence of fingerprint formulation to the fatty components of the skin deposit that are secreted by sweat pores that exist on friction ridges. Cross-linking between oppositely charged molecules can be used to prepare chitosan microparticles. Tripolyphosphate (TPP) is a nontoxic polyanion; it can form particles by ionic interaction between positively charged amino groups of CS and negatively charged counter ions of TPP. In the present study chitosan microparticles (CSMPs) were prepared under four different processing/formulation conditions. The development of latent fingermarks using CSMPs was analysed by using a 23 factorial design, which considered simultaneously three main factors: pH, ionic strength and CS: TPP (v/v) ratio. In this study CS: TPP ratio has the strongest effect on fingerprint quality. The best conditions for fingerprint visualisation were pH 4.8, CS: TPP of 2:1 and 0.2 M of ionic strength in buffer (AB-12).

Original languageEnglish
Pages (from-to)290-298
Number of pages9
JournalFood Hydrocolloids
Volume71
Early online date22 Dec 2016
DOIs
Publication statusPublished - Oct 2017

Fingerprint

tripolyphosphates
Chitosan
chitosan
Visualization
Dermatoglyphics
ionic strength
Ionic strength
Osmolar Concentration
polymers
Polymers
food transport
dusting
drug delivery systems
sweat
Radiation counters
triphosphoric acid
Friction
Sweat
Drug Delivery Systems
crosslinking

Cite this

@article{8fd7493e7a3f45cf9049883bb01b7047,
title = "The potential of chitosan-tripolyphosphate microparticles in the visualisation of latent fingermarks",
abstract = "Chitosan (CS) is a cationic polymer with excellent film, gel and particle-forming properties. This polymer has been investigated widely for its potential in the development of food and drug delivery systems and pharmaceutical applications, however it has not generally been considered in forensic applications for example fingerprints (fingermarks). Fingerprints are a very common form of physical evidence. The most commonly used procedure for revealing the ridge pattern is powder dusting, which relies on the mechanical adherence of fingerprint formulation to the fatty components of the skin deposit that are secreted by sweat pores that exist on friction ridges. Cross-linking between oppositely charged molecules can be used to prepare chitosan microparticles. Tripolyphosphate (TPP) is a nontoxic polyanion; it can form particles by ionic interaction between positively charged amino groups of CS and negatively charged counter ions of TPP. In the present study chitosan microparticles (CSMPs) were prepared under four different processing/formulation conditions. The development of latent fingermarks using CSMPs was analysed by using a 23 factorial design, which considered simultaneously three main factors: pH, ionic strength and CS: TPP (v/v) ratio. In this study CS: TPP ratio has the strongest effect on fingerprint quality. The best conditions for fingerprint visualisation were pH 4.8, CS: TPP of 2:1 and 0.2 M of ionic strength in buffer (AB-12).",
keywords = "Chitosan, Formulation engineering, Latent fingermark development, Microparticles, Non-porous surfaces",
author = "Hejjaji, {Ezzeddin M A} and Smith, {Alan M.} and Morris, {Gordon A.}",
note = "Not OA compliant; AAM deposited in ePrints 9 months after online publication.",
year = "2017",
month = "10",
doi = "10.1016/j.foodhyd.2016.12.020",
language = "English",
volume = "71",
pages = "290--298",
journal = "Food Hydrocolloids",
issn = "0268-005X",
publisher = "Elsevier",

}

The potential of chitosan-tripolyphosphate microparticles in the visualisation of latent fingermarks. / Hejjaji, Ezzeddin M A; Smith, Alan M.; Morris, Gordon A.

In: Food Hydrocolloids, Vol. 71, 10.2017, p. 290-298.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The potential of chitosan-tripolyphosphate microparticles in the visualisation of latent fingermarks

AU - Hejjaji, Ezzeddin M A

AU - Smith, Alan M.

AU - Morris, Gordon A.

N1 - Not OA compliant; AAM deposited in ePrints 9 months after online publication.

PY - 2017/10

Y1 - 2017/10

N2 - Chitosan (CS) is a cationic polymer with excellent film, gel and particle-forming properties. This polymer has been investigated widely for its potential in the development of food and drug delivery systems and pharmaceutical applications, however it has not generally been considered in forensic applications for example fingerprints (fingermarks). Fingerprints are a very common form of physical evidence. The most commonly used procedure for revealing the ridge pattern is powder dusting, which relies on the mechanical adherence of fingerprint formulation to the fatty components of the skin deposit that are secreted by sweat pores that exist on friction ridges. Cross-linking between oppositely charged molecules can be used to prepare chitosan microparticles. Tripolyphosphate (TPP) is a nontoxic polyanion; it can form particles by ionic interaction between positively charged amino groups of CS and negatively charged counter ions of TPP. In the present study chitosan microparticles (CSMPs) were prepared under four different processing/formulation conditions. The development of latent fingermarks using CSMPs was analysed by using a 23 factorial design, which considered simultaneously three main factors: pH, ionic strength and CS: TPP (v/v) ratio. In this study CS: TPP ratio has the strongest effect on fingerprint quality. The best conditions for fingerprint visualisation were pH 4.8, CS: TPP of 2:1 and 0.2 M of ionic strength in buffer (AB-12).

AB - Chitosan (CS) is a cationic polymer with excellent film, gel and particle-forming properties. This polymer has been investigated widely for its potential in the development of food and drug delivery systems and pharmaceutical applications, however it has not generally been considered in forensic applications for example fingerprints (fingermarks). Fingerprints are a very common form of physical evidence. The most commonly used procedure for revealing the ridge pattern is powder dusting, which relies on the mechanical adherence of fingerprint formulation to the fatty components of the skin deposit that are secreted by sweat pores that exist on friction ridges. Cross-linking between oppositely charged molecules can be used to prepare chitosan microparticles. Tripolyphosphate (TPP) is a nontoxic polyanion; it can form particles by ionic interaction between positively charged amino groups of CS and negatively charged counter ions of TPP. In the present study chitosan microparticles (CSMPs) were prepared under four different processing/formulation conditions. The development of latent fingermarks using CSMPs was analysed by using a 23 factorial design, which considered simultaneously three main factors: pH, ionic strength and CS: TPP (v/v) ratio. In this study CS: TPP ratio has the strongest effect on fingerprint quality. The best conditions for fingerprint visualisation were pH 4.8, CS: TPP of 2:1 and 0.2 M of ionic strength in buffer (AB-12).

KW - Chitosan

KW - Formulation engineering

KW - Latent fingermark development

KW - Microparticles

KW - Non-porous surfaces

UR - http://www.scopus.com/inward/record.url?scp=85009391311&partnerID=8YFLogxK

U2 - 10.1016/j.foodhyd.2016.12.020

DO - 10.1016/j.foodhyd.2016.12.020

M3 - Article

VL - 71

SP - 290

EP - 298

JO - Food Hydrocolloids

JF - Food Hydrocolloids

SN - 0268-005X

ER -