An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response
Natural pigments occur in plants as secondary metabolites and have been used as safe colourants in food. Studies have reported that their unstable colour intensity might be related to metal ion interaction, which leads to the formation of metal–pigment complexes. This underlines the need for further...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Biosensors |
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| Online Access: | https://www.mdpi.com/2079-6374/13/5/554 |
| _version_ | 1797600818794332160 |
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| author | Raspati D. Mulyaningsih Rimadani Pratiwi Aliya N. Hasanah |
| author_facet | Raspati D. Mulyaningsih Rimadani Pratiwi Aliya N. Hasanah |
| author_sort | Raspati D. Mulyaningsih |
| collection | DOAJ |
| description | Natural pigments occur in plants as secondary metabolites and have been used as safe colourants in food. Studies have reported that their unstable colour intensity might be related to metal ion interaction, which leads to the formation of metal–pigment complexes. This underlines the need for further investigations on the use of natural pigments in metal detection using colorimetric methods, since metals are important elements and can be hazardous when present in large amounts. This review aimed to discuss the use of natural pigments (mainly betalains, anthocyanins, curcuminoids, carotenoids, and chlorophyll) as reagents for portable metal detection based on their limits of detection, to determine which pigment is best for certain metals. Colorimetric-related articles over the last decade were gathered, including those involving methodological modifications, sensor developments, and a general overview. When considering sensitivity and portability, the results revealed that betalains are best applied for copper, using a smartphone-assisted sensor; curcuminoids are best applied for lead, using a curcumin nanofiber; and anthocyanin is best applied for mercury, using anthocyanin hydrogel. This provides a new perspective on the use of colour instability for the detection of metals with modern sensor developments. In addition, a coloured sheet representing metal concentrations may be useful as a standard to support on-site detection with trials on masking agents to improve selectivity. |
| first_indexed | 2024-03-11T03:53:23Z |
| format | Article |
| id | doaj.art-02b1186b44ca451f81b60a89df435ce6 |
| institution | Directory Open Access Journal |
| issn | 2079-6374 |
| language | English |
| last_indexed | 2024-03-11T03:53:23Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biosensors |
| spelling | doaj.art-02b1186b44ca451f81b60a89df435ce62023-11-18T00:41:22ZengMDPI AGBiosensors2079-63742023-05-0113555410.3390/bios13050554An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour ResponseRaspati D. Mulyaningsih0Rimadani Pratiwi1Aliya N. Hasanah2Master Program in Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, IndonesiaDepartment of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, IndonesiaDepartment of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, IndonesiaNatural pigments occur in plants as secondary metabolites and have been used as safe colourants in food. Studies have reported that their unstable colour intensity might be related to metal ion interaction, which leads to the formation of metal–pigment complexes. This underlines the need for further investigations on the use of natural pigments in metal detection using colorimetric methods, since metals are important elements and can be hazardous when present in large amounts. This review aimed to discuss the use of natural pigments (mainly betalains, anthocyanins, curcuminoids, carotenoids, and chlorophyll) as reagents for portable metal detection based on their limits of detection, to determine which pigment is best for certain metals. Colorimetric-related articles over the last decade were gathered, including those involving methodological modifications, sensor developments, and a general overview. When considering sensitivity and portability, the results revealed that betalains are best applied for copper, using a smartphone-assisted sensor; curcuminoids are best applied for lead, using a curcumin nanofiber; and anthocyanin is best applied for mercury, using anthocyanin hydrogel. This provides a new perspective on the use of colour instability for the detection of metals with modern sensor developments. In addition, a coloured sheet representing metal concentrations may be useful as a standard to support on-site detection with trials on masking agents to improve selectivity.https://www.mdpi.com/2079-6374/13/5/554natural pigmentsmetalscolourimetry |
| spellingShingle | Raspati D. Mulyaningsih Rimadani Pratiwi Aliya N. Hasanah An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response Biosensors natural pigments metals colourimetry |
| title | An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response |
| title_full | An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response |
| title_fullStr | An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response |
| title_full_unstemmed | An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response |
| title_short | An Update on the Use of Natural Pigments and Pigment Nanoparticle Adducts for Metal Detection Based on Colour Response |
| title_sort | update on the use of natural pigments and pigment nanoparticle adducts for metal detection based on colour response |
| topic | natural pigments metals colourimetry |
| url | https://www.mdpi.com/2079-6374/13/5/554 |
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