Mini-Symposium on Initiatives in (Analytical) Sciences

Linkage to Local Issue-Global Impacts-Sustainable World”

y = 0.4658x + 6.9881R² = 0.9889

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Ammonium-nitrogen, mg/L

in downscaling cost effective chemical analysis Initiatives using moving drop and other novel platforms moving drop other novel platforms

Chiang Mai University - Prof. Dr. Kate Grudpan, Dr. Sutasinee Apichai, Dr. Suphasinee Sateanchok, Dr. Khajorngai Thajee and Ms. Pheeraya Jaikang

Rajabhat Universities - Lampang Rajabhat University; Mr. Narong Kotchabhakdi

Buriram Rajabhat University; Ms. Chuleekant SainateChiang Rai Rajabhat University; Dr. Napaporn Wannaprom & Dr. Yaowalak Khanhuathon

Rajamangala University - Rajamangala University of Technology Lanna Chiang Rai; Dr. Karuna Jainontee

King Mongkut's University of Technology Thonburi; Asst. Prof. Dr. Monapat Vongboot

Stirring piece for coffee

The solution of reagent and sample are dropped on the position A and B.

The change of reaction is monitored by taking a photo or recording a video.

The signals of color solution on a position D are translate by using the software.

The signals are statistically evaluated.

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Colorimetric assay Kinetic study

Iron assay

Copper assay

Phosphate assay

using 1,10-phenanthroline reagent

using bicinchoninic acid method

using molybdenum blue method

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Concentration of analyte

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NH3

NH4+ OH-+

PTFE thread sheet

Natural indicator-immobilized paper

Transparent sticker

Natural indicator-immobilized paper preparation

Adjust pH

Dried butterfly pea flower

Butterfly pea flower extract

Natural indicator-immobilized paper

Filter paper

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NH4+-N, mg/L

NH4+-N solution

NaOH solution2

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The natural material sensor with downscaling pervaporation and gas diffusion for ammonium-nitrogen determination

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