Colourimetric determination of features of an air sampling technique optimal for detection of surfactants

Nur Hazimah Abdul Halim, Norfazrin Mohd Hanif, Mohamed Rozali Othman, Mohd Talib Latif

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Surfactants in the atmosphere may act as cloud condensation nuclei, with a potentially negative impact on the global climate. Therefore, accurate determination of surfactants is crucial in order to investigate the possible effects of surfactants on the atmosphere. The aim of this study was to identify the optimum sampling method for measuring the maximum quantity of surfactants present in ambient air. Air samples were collected using a range of air sampling pumps that were made to vary in terms of flow rate, storage period, type of absorbing solution and the characteristics of the impinger tube. Samples obtained were analysed by colourimetry for anionic and cationic surfactants as methylene blue-active substances (MBAS) and disulphine blue-active substances (DBAS), respectively. Absorbance was measured at 650 nmfor MBAS and 628 nmfor DBAS using UV-visible spectrophotometer. We found that the optimum sampling method consisted of an absorbent solution (deionised water, buffer solution and methylene blue/disulphine blue solution) with the flow rate of 1.0 LImin. The concentration of surfactants in all sampling methods remained constant regardless of the storage period (1 day and 4 days), indicating that surfactants in the absorbing solution are quite stable. Covering the impinger tube was shown to influence the amount of both anionic and cationic surfactants detected.

Original languageEnglish
Pages (from-to)175-179
Number of pages5
JournalSains Malaysiana
Volume39
Issue number2
Publication statusPublished - Apr 2010

Fingerprint

surfactants
air
methylene blue
sampling
storage time
methodology
absorbents
spectrophotometers
pumps
absorbance
buffers
climate
water
anionic surfactants
cationic surfactants

Keywords

  • Ambient air
  • Anionic and cationic surfactants
  • Colourimetry

ASJC Scopus subject areas

  • General

Cite this

Colourimetric determination of features of an air sampling technique optimal for detection of surfactants. / Halim, Nur Hazimah Abdul; Hanif, Norfazrin Mohd; Othman, Mohamed Rozali; Latif, Mohd Talib.

In: Sains Malaysiana, Vol. 39, No. 2, 04.2010, p. 175-179.

Research output: Contribution to journalArticle

@article{f0c77b4889d04be6afcdc9e32e1bc9c0,
title = "Colourimetric determination of features of an air sampling technique optimal for detection of surfactants",
abstract = "Surfactants in the atmosphere may act as cloud condensation nuclei, with a potentially negative impact on the global climate. Therefore, accurate determination of surfactants is crucial in order to investigate the possible effects of surfactants on the atmosphere. The aim of this study was to identify the optimum sampling method for measuring the maximum quantity of surfactants present in ambient air. Air samples were collected using a range of air sampling pumps that were made to vary in terms of flow rate, storage period, type of absorbing solution and the characteristics of the impinger tube. Samples obtained were analysed by colourimetry for anionic and cationic surfactants as methylene blue-active substances (MBAS) and disulphine blue-active substances (DBAS), respectively. Absorbance was measured at 650 nmfor MBAS and 628 nmfor DBAS using UV-visible spectrophotometer. We found that the optimum sampling method consisted of an absorbent solution (deionised water, buffer solution and methylene blue/disulphine blue solution) with the flow rate of 1.0 LImin. The concentration of surfactants in all sampling methods remained constant regardless of the storage period (1 day and 4 days), indicating that surfactants in the absorbing solution are quite stable. Covering the impinger tube was shown to influence the amount of both anionic and cationic surfactants detected.",
keywords = "Ambient air, Anionic and cationic surfactants, Colourimetry",
author = "Halim, {Nur Hazimah Abdul} and Hanif, {Norfazrin Mohd} and Othman, {Mohamed Rozali} and Latif, {Mohd Talib}",
year = "2010",
month = "4",
language = "English",
volume = "39",
pages = "175--179",
journal = "Sains Malaysiana",
issn = "0126-6039",
publisher = "Penerbit Universiti Kebangsaan Malaysia",
number = "2",

}

TY - JOUR

T1 - Colourimetric determination of features of an air sampling technique optimal for detection of surfactants

AU - Halim, Nur Hazimah Abdul

AU - Hanif, Norfazrin Mohd

AU - Othman, Mohamed Rozali

AU - Latif, Mohd Talib

PY - 2010/4

Y1 - 2010/4

N2 - Surfactants in the atmosphere may act as cloud condensation nuclei, with a potentially negative impact on the global climate. Therefore, accurate determination of surfactants is crucial in order to investigate the possible effects of surfactants on the atmosphere. The aim of this study was to identify the optimum sampling method for measuring the maximum quantity of surfactants present in ambient air. Air samples were collected using a range of air sampling pumps that were made to vary in terms of flow rate, storage period, type of absorbing solution and the characteristics of the impinger tube. Samples obtained were analysed by colourimetry for anionic and cationic surfactants as methylene blue-active substances (MBAS) and disulphine blue-active substances (DBAS), respectively. Absorbance was measured at 650 nmfor MBAS and 628 nmfor DBAS using UV-visible spectrophotometer. We found that the optimum sampling method consisted of an absorbent solution (deionised water, buffer solution and methylene blue/disulphine blue solution) with the flow rate of 1.0 LImin. The concentration of surfactants in all sampling methods remained constant regardless of the storage period (1 day and 4 days), indicating that surfactants in the absorbing solution are quite stable. Covering the impinger tube was shown to influence the amount of both anionic and cationic surfactants detected.

AB - Surfactants in the atmosphere may act as cloud condensation nuclei, with a potentially negative impact on the global climate. Therefore, accurate determination of surfactants is crucial in order to investigate the possible effects of surfactants on the atmosphere. The aim of this study was to identify the optimum sampling method for measuring the maximum quantity of surfactants present in ambient air. Air samples were collected using a range of air sampling pumps that were made to vary in terms of flow rate, storage period, type of absorbing solution and the characteristics of the impinger tube. Samples obtained were analysed by colourimetry for anionic and cationic surfactants as methylene blue-active substances (MBAS) and disulphine blue-active substances (DBAS), respectively. Absorbance was measured at 650 nmfor MBAS and 628 nmfor DBAS using UV-visible spectrophotometer. We found that the optimum sampling method consisted of an absorbent solution (deionised water, buffer solution and methylene blue/disulphine blue solution) with the flow rate of 1.0 LImin. The concentration of surfactants in all sampling methods remained constant regardless of the storage period (1 day and 4 days), indicating that surfactants in the absorbing solution are quite stable. Covering the impinger tube was shown to influence the amount of both anionic and cationic surfactants detected.

KW - Ambient air

KW - Anionic and cationic surfactants

KW - Colourimetry

UR - http://www.scopus.com/inward/record.url?scp=77952223646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952223646&partnerID=8YFLogxK

M3 - Article

VL - 39

SP - 175

EP - 179

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 2

ER -