Toward Quantitative Chemical Analysis Using a Ruler on Paper: An Approach to Transduce Color to Length Based on Coffee-Ring Effect | Zendy

Dagan Zhang | Zendy; Biao Ma | Zendy; Litianyi Tang | Zendy; Hong Liu | Zendy

Open Access

Toward Quantitative Chemical Analysis Using a Ruler on Paper: An Approach to Transduce Color to Length Based on Coffee-Ring Effect

Author(s) -

Dagan Zhang,

Biao Ma,

Litianyi Tang,

Hong Liu

Publication year - 2018

Publication title -

analytical chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.117

H-Index - 332

eISSN - 1520-6882

pISSN - 0003-2700

DOI - 10.1021/acs.analchem.7b03790

Subject(s) - chemistry , colored , analyte , quantitative analysis (chemistry) , ruler , lamination , biological system , ring (chemistry) , naked eye , sample (material) , interference (communication) , chromatography , analytical chemistry (journal) , artificial intelligence , computer science , detection limit , organic chemistry , telecommunications , materials science , physics , quantum mechanics , layer (electronics) , composite material , biology , channel (broadcasting)

We report a quantitative analytical method using the naked eye. The method is based on the coffee-ring effect on paper, which converts a colored solution to stains on the paper. It is found that the width of the colored stains is correlated to the concentration of analyte so that quantitative analysis can be accomplished using a ruler. The influence of the shape and lamination of the paper reservoir to the test results is studied to find the optimal one for unambiguous analysis. It is also found that the sample color does not cause interference to the test. The applicability of the method to quantitative chemical analysis is demonstrated by detection of glucose and lactate.

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