Many of the fruits and vegetables we eat contain pesticide residue. To better detect the presence of these substances in food products, Swedish researchers have developed an inexpensive and reproducible mini-sensor.
Developed by scientists from the Karolinska Institute in Sweden, this nano-sensor is inspired by a method that has existed since the 1970s: surface-enhanced Raman scattering (SERS). This is a rather technical term for a process that consists in identifying the presence of biomolecules via a metallic surface.
This technique could allow the presence of pesticides in fruits and vegetables to be easily detected, providing a fast and efficient way to protect human health from these harmful substances. The new research could also help reduce the costs of a laborious and complicated process, in large part because of its price.
"The employment of SERS sensors in practical applications is hindered by high fabrication costs from processes with limited scalability, poor batch-to-batch reproducibility, substrate stability, and uniformity," explain the researchers in a paper outlining the technical process they developed.
In fact, the technique of these Swedish scientists actually involved using a SERS nanosensor. The researchers deposited aerosols using flame spray to rapidly make SERS films. To test the effectiveness of the process, small amounts of pesticides were placed on apples and then collected in the laboratory with a swab before being analyzed by the nano-sensor.
Even with tiny amounts, the sensor developed by the Karolinska Institute was able to identify the presence of pesticide within five minutes. However, the effectiveness of this tool needs to be supported by larger scientific tests before it can be deployed on a larger scale.
This isn't the first time technology has been at the center of a bid to improve food safety. In December 2021, Taiwanese manufacturer Asus introduced a device that can help disinfect fruits and vegetables before cooking them by analyzing the quality of the water they're rinsed in.
Called "Asus PureGo," the device is automatically activated when immersed in water. If the module's indicator shows red or orange, your fruits or vegetables still need to be washed. When the indicator turns green, you can eat them!
ETX Studio
Sat Jun 11 2022
![This sensor could detect pesticides in fruits and vegetables within minutes This sensor could detect pesticides in fruits and vegetables within minutes](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2022-06/61654852057_APPLE.jpg)
Swedish researchers have developed an inexpensive and reproducible mini-sensor to quickly detect pesticides in fruits and vegetables. - ETX Studio
![Reman suspek kes keropok beracun disambung dua hari Reman suspek kes keropok beracun disambung dua hari](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/81721107133_keropokberacunrem.jpg)
Reman suspek kes keropok beracun disambung dua hari
Tempoh reman terhadap seorang pemilik kebun disambung selama dua hari, bagi membantu siasatan kematian dua kanak-kanak yang meninggal dunia akibat makan keropok beracun.
![Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/81721100784_TBmysj.jpg)
Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM
Jika positif COVID-19 melalui ujian kendiri, pesakit boleh mengunjungi klinik dan hospital berdekatan bagi mendapatkan pengesahan.
![Mayat hampir reput dijumpai di rumah usang Mayat hampir reput dijumpai di rumah usang](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2023-12/41702437730_maut.jpg)
Mayat hampir reput dijumpai di rumah usang
Mayat hampir reput ditemui di sebuah rumah usang di Kesang Laut, berdekatan pusat timbang Jabatan Pengangkutan Jalan (JPJ) pada Ahad.
Wanita dakwa dituduh Rafizi fail saman
Seorang wanita memfailkan saman terhadap Menteri Ekonomi, Rafizi Ramli bagi menuntut permohonan maaf secara terbuka berhubung dakwaan bahawa wanita berkenaan ialah isteri kepada bekas menteri yang dikaitkan dengan isu kapal tempur pesisir (LCS).
Bagaimanapun, Rafizi bergantung kepada pembelaan justifikasi berkata bersedia membuktikan kenyataan di mahkamah termasuk perlindungan bersyarat dan ulasan yang saksama terhadap saman fitnah yang difailkan oleh Zainab Mohd Salleh.
Bagaimanapun, Rafizi bergantung kepada pembelaan justifikasi berkata bersedia membuktikan kenyataan di mahkamah termasuk perlindungan bersyarat dan ulasan yang saksama terhadap saman fitnah yang difailkan oleh Zainab Mohd Salleh.
![Ahli Parlimen PN pakai reben putih di lengan tak langgar peraturan - Timbalan Speaker Ahli Parlimen PN pakai reben putih di lengan tak langgar peraturan - Timbalan Speaker](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/61721011336_PerikatanNasional.jpg)
Ahli Parlimen PN pakai reben putih di lengan tak langgar peraturan - Timbalan Speaker
Jelas Timbalan Yang Dipertua Dewan Rakyat itu, pendirian tersebut adalah keputusannya dan ia tidak dibuat oleh Yang Dipertua Dewan Rakyat, Tan Sri Johari Abdul.
![Trump umum Senator JD Vance sebagai calon Naib Presidennya Trump umum Senator JD Vance sebagai calon Naib Presidennya](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/81721104956_JDVance.jpg)
Trump umum Senator JD Vance sebagai calon Naib Presidennya
Bekas Presiden Amerika Syarikat Donald Trump mengumumkan Senator Ohio JD Vance akan menjadi calon Naib Presidennya dalam pilihan raya 2024.
AWANI Ringkas: Pan Gon bakal umum letak jawatan hari ini?
Ikuti rangkuman berita utama yang menjadi tumpuan sepanjang hari di Astro AWANI menerusi AWANI Ringkas.
![iOS 18 tampil ciri kembalikan gambar, video yang hilang atau rosak iOS 18 tampil ciri kembalikan gambar, video yang hilang atau rosak](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/81721103714_iOS.jpg)
iOS 18 tampil ciri kembalikan gambar, video yang hilang atau rosak
Pada iOS 18, iPadOS 18 dan macOS Sequoia, Apple memperkenalkan ciri baharu yang membolehkan data yang hilang ini dikembalikan.
[TERKINI] Suspek kes pempengaruh Esha mengaku bersalah
Seorang pemandu lori berusia 43 tahun mengaku bersalah membuat kenyataan menyinggung perasaan terhadap mendiang empengaruh media sosial, A Rajeswary atau Esha di TikTok.
Projek HSR Jakarta-Bandung rekod 4 juta penumpang
Projek Kereta Api Laju (HSR) Jakarta-Bandung yang dikenali sebagai Whoosh membawa empat juta penumpang sejak ia beroperasi secara komersial pada 17 Oktober, tahun lalu.