Browsing by Author Kraingkrai Ponhong

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Showing results 1 to 20 of 20
Issue DateTitleAuthor(s)
1-May-2022Article A Simple and Reliable Dispersive Liquid-Liquid Microextraction with Smartphone-Based Digital Images for Determination of Carbaryl Residues in Andrographis paniculata Herbal Medicines Using Simple Peroxidase Extract from Senna siamea Lam. BarkSam Ang Supharoek; Watsaka Siriangkhawut; Kate Grudpan; Kraingkrai Ponhong
1-Feb-2020A Cost-Effective Spectrophotometric Method Based on Enzymatic Analysis of Jackfruit Latex Peroxidase for the Determination of Carbaryl and Its Metabolite 1-Napthol Residues in Organic and Chemical-Free VegetablesPirom Didpinrum; Kraingkrai Ponhong; Watsaka Siriangkhawut; Sam ang Supharoek; Kate Grudpan
2012Development of flow-based systems for chemical analysis involving biochemical species = การพัฒนาระบบที่อาศัยการไหลเพื่อการวิเคราะห์ทางเคมีที่เกี่ยวข้องกับสารทางชีวเคมี / Kraingkrai PonhongKraingkrai Ponhong
11-Jul-2022Dual determination of nitrite and iron by a single greener sequential injection spectrophotometric system employing a simple single aqueous extract from Areca catechu Linn. serving as a natural reagentKraingkrai Ponhong; Watsaka Siriangkhawut; Chang Young Lee; Norio Teshima; Kate Grudpan; Sam Ang Supharoek
1-Apr-2018Employing natural reagents from turmeric and lime for acetic acid determination in vinegar sampleSam ang Supharoek; Kraingkrai Ponhong; Watsaka Siriangkhawut; Kate Grudpan
1-Jul-2016Employing peroxidase from Thai indigenous plants for the application of hydrogen peroxide assayKraingkrai Ponhong; Sam ang Supharoek; Watsaka Siriangkhawut; Kate Grudpan
1-Mar-2022Exploiting crude betel nut (Areca catechu Linn.) extracted solution as a natural reagent with sequential injection spectrophotometry for iron analysis in rice samplesBordin Weerasuk; Sam ang Supharoek; Kate Grudpan; Kraingkrai Ponhong
15-Aug-2017A green analytical method for benzoyl peroxide determination by a sequential injection spectrophotometry using natural reagent extracts from pumpkinSam ang Supharoek; Kraingkrai Ponhong; Kate Grudpan
1-Aug-2019A green colorimetric method using guava leaves extract for quality control of iron content in pharmaceutical formulationsWatsaka Siriangkhawut; Kraingkrai Ponhong; Kate Grudpan
1-Jan-2016A green sequential injection spectrophotometric approach using natural reagent extracts from heartwood of Ceasalpinia Sappan Linn. for determination of aluminiumWatsaka Siriangkhawut; Yaowalak Khanhuathon; Piyanete Chantiratikul; Kraingkrai Ponhong; Kate Grudpan
1-Jan-2019A new method for spectrophotometric determination of carbaryl based on rubber tree bark peroxidase enzymatic reactionSam ang Supharoek; Kraingkrai Ponhong; Watsaka Siriangkhawut; Kate Grudpan
1-Sep-2020A new spectrophotometric method based on peroxidase enzymatic reaction to determine tetracycline in pharmaceutical and water samplesSam ang Supharoek; Kraingkrai Ponhong; Bordin Weerasuk; Watsaka Siriangkhawut; Kate Grudpan
25-Oct-2021A newly designed sticker-plastic sheet platform and smartphone-based digital imaging for protein assay in food samples with downscaling Kjeldahl digestionPirom Didpinrum; Watsaka Siriangkhawut; Kraingkrai Ponhong; Piyanete Chantiratikul; Kate Grudpan
15-Jan-2023One-pot co-extraction of dispersive solid phase extraction employing iron-tannic nanoparticles assisted cloud point extraction for the determination of tetracyclines by high-performance liquid chromatographyKamolrat Phomai; Sam ang Supharoek; Jitlada Vichapong; Kate Grudpan; Kraingkrai Ponhong
1-Jan-2015A rapid and sensitive spectrophotometric method for the determination of benzoyl peroxide in wheat flour samplesKraingkrai Ponhong; Sam Ang Supharoek; Watsaka Siriangkhawut; Kate Grudpan
15-Jul-2011Sequential injection Lab-at-valve (SI-LAV) segmented flow system for kinetic study of an enzymeKraingkrai Ponhong; Supaporn Kradtap Hartwell; Kate Grudpan
15-Dec-2011Simultaneous injection effective mixing analysis system for the determination of direct bilirubin in urinary samplesKraingkrai Ponhong; Norio Teshima; Kate Grudpan; Shoji Motomizu; Tadao Sakai
15-Jul-2012Simultaneous injection effective mixing flow analysis of urinary albumin using dye-binding reactionNuanlaor Ratanawimarnwong; Kraingkrai Ponhong; Norio Teshima; Duangjai Nacapricha; Kate Grudpan; Tadao Sakai; Shoji Motomizu
12-Apr-2020Small-Scale Ultrasound-Assisted Extraction of Phenolics from Pomegranate Peels and Their Application as a Natural Reagent for the Colorimetric Assay of IronWatsaka Siriangkhawut; Pirom Didpinrum; Yaowalak Khanhuathon; Kraingkrai Ponhong; Kate Grudpan
1-Sep-2022Ultrasound-Assisted One-Pot Cloud Point Extraction for Iron Determination Using Natural Chelating Ligands from Dipterocarpus intricatus Dyer FruitSam Ang Supharoek; Bordin Weerasuk; Watsaka Siriangkhawut; Kate Grudpan; Kraingkrai Ponhong