Haider Al Lawati

Sultan Qaboos University, CHEMISTRY, Faculty Member

Followers

Following

Co-authors

Mentions

Public Views

Associate Professor
- Established microfluidics-chemiluminescence research group in 2009
- Establish liquid chromatography - mass spectrometer research facility in 2014
- Successfully managed and led many strategic research projects

1- His Majesty Sultan Qaboos Grant (HM/SCI/CHEM/09/01): Developing Microfluidic Systems for Routine Analysis of Pharmaceutical samples, 2009-2013
2- (IG/SCI/CHEM/09/04): Towards µ-total analytical system µTAS (lab on a chip) for determination of phenols and amines in water using coumarin-6- sulfonyl chloride(C6SCl) as a fluorogenic label, 2009-2012.
3- The Research Council Grant (RC/SCI/CHEM/12/01): Capillary HPLC systems for pharmaceutical and biological analysis using microfluidic chip chemiluminescence detector, The Research Council, 2012-2015.
4- The Research Council Grant (RC/SCI/CHEM/14/03) Rapid liquid chromatography-mass spectrometry methods for monitoring synthetic adulterants in herbal medicines and dietary supplements 2014-2017.
5- His Majesty Sultan Qaboos Grant (HM/SCI/CHEM/16/01): Novel microfluidics devices for the determination of the total phenolic content in Omani honey and fruits samples, 2016-2019
Awards:
• National Research Award in the research area Culture, Basic and Social Sciences, 2018, TRC-Oman (Type I)
• National Research Award in the research area Culture, Basic and Social Sciences, 2018, TRC-Oman (Type II)
• National Research Award in the research area Culture, Basic and Social Sciences, 2016, TRC-Oman (Type I)
• First GCC award of excellence in Chemistry, 7th December 2015

less

InterestsView All (6)

Uploads

Papers by Haider Al Lawati

High-Performance Liquid Chromatography Determination of Anilines with Fluorescent Detection and Pre-Column Derivatization

Instrumentation Science & Technology, 2013

ABSTRACT A simple, sensitive, and rapid reverse-phase high-performance liquid chromatography (RP-... more ABSTRACT A simple, sensitive, and rapid reverse-phase high-performance liquid chromatography (RP-HPLC) method for the determination of anilines in water is proposed. The use of 2,7-diethylamino-2-oxo-2H-chromen-3-yl-benzothiazole-6-sulfonylchloride (coumarin 6-SO2Cl) as a fluorigenic-labeling reagent was investigated. The label reacted with aniline within 30 min under mild conditions (ambient temperature, pH 9.0) to give sulfonamides that were separated by RP-HPLC employing fluorescence detection with an excitation wavelength of 470 nm and an emission wavelength of 520 nm. The optimum conditions for fluorescence, derivatization, and chromatographic separation were established. The calibration curves were linear for the range 0–800 ppb. The proposed method was applied for the determination of anilines in spiked drinking water samples and irrigation water samples with recoveries of 90.0–103.9% and relative standard deviations of 1.2–4.7%, respectively. This method showed good accuracy and repeatability that can be used for the quantification of aniline in real samples.

Removal of Zn2+ and SO4 2− from aqueous solutions on acidic and chelating dehydrated carbon

Environmental Science and Pollution Research, May 7, 2016

Haider Al Lawati

Uploads

Papers by Haider Al Lawati

Log In