Ion composition profiling and pattern recognition of vegetable sap using a solid-contact ion-selective electrode array
Journal
Biosensors and Bioelectronics: X
Journal Volume
9
Date Issued
2021
Author(s)
Abstract
This is the first study to develop an effective tool for plant sap analysis based on a solid-contact ion-selective electrode (SCISE) array, which has the advantages of on-site, direct and fast analysis. SCISEs are all-solid-state ion-selective electrodes with a conducting polymer for ion-to-electron transduction. With the conducting polymer solid-contact, the electrodes perform high stability and short response time (<30 s) during potentiometric sensing. The developed SCISE array consists of potassium (SEN = 51.9 mV/decade), sodium (64.2 mV/decade), ammonium (59.3 mV/decade), calcium (32.1 mV/decade), and magnesium (33.0 mV/decade) selective electrodes. To verify the application, seven types of fresh crude vegetable leaf juices (ion concentration range: 10?3–10?4 M) were measured with the array, and the result was compared with ion chromatography. It was found that the array was able to obtain the unique, distinguishable ion composition profile as a radar plot of each vegetable sap, implying the fingerprint application of the present technology. Furthermore, applying principle component analysis (PCA) and K-means clustering, lettuces grown in different environments (deficiency either in potassium or in nitrate) are able to be discriminated. In summary, we demonstrate a tool for on-site, high-throughput and direct plant sap analysis based on SCISE array. Moreover, it could combine with pattern recognition and become a promising tools which could provide a diagnosis of the nutritive status of vegetables. ? 2021 The Authors
Subjects
Pattern recognition
Sap analysis
Solid-contact ion-selective electrode
Ion chromatography
Ion selective electrodes
Ions
K-means clustering
Lettuce
Nearest neighbor search
Principal component analysis
Vegetables
Direct analysis
Effective tool
Ion composition
Ion-selective electrode
Ion-selective electrodes array
On-site analysis
Plant sap
Sap analyse
Solid contacts
Conducting polymers
ammonia
calcium
ion
magnesium
nitrate
polymer
potassium
sodium
analytic method
Article
chemical composition
concentration (parameter)
controlled study
electron
high throughput analysis
ion chromatography
k means clustering
lettuce
nonhuman
nutritional status
pattern recognition
plant growth
plant identification
principal component analysis
reaction time
signal transduction
solid state
vegetable
vegetable juice
voltammetry
SDGs
Type
journal article