อ.เจษฎา ให้ความรู้กรณี “ต้นหอม” มีคราบสีฟ้า ไม่ใช่การย้อมสี แต่เป็นสารเคมีทางการเกษตรที่ตกค้างอยู่ แนะล้างออกให้มากที่สุดก่อนนำไปรับประทาน
วันที่ 8 มกราคม 2566 มีรายงานว่า ศ.ดร.เจษฎา เด่นดวงบริพันธ์ อาจารย์ประจำภาควิชาชีววิทยา คณะวิทยาศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย และนักสื่อสารวิทยาศาสตร์ โพสต์ข้อความให้ความรู้กรณี คลิป “ต้นหอม” มีคราบสีฟ้าๆ อยู่ตามใบ ซึ่งหลายคนสงสัยว่าจะเป็นการพ่นสีให้ต้นหอมดูสด ดูเขียวนั้น
เกี่ยวกับเรื่องนี้ ศ.ดร.เจษฎา ระบุว่า ต้นหอมไม่ได้ย้อมสีฟ้า แต่เป็นสารเคมีทางการเกษตรที่ตกค้างอยู่ครับ จริงๆ เรื่องนี้ก็เคยพูดหลายครั้งแล้ว แต่วันนี้ก็มีคลิปวิดีโอใหม่มาอีกแล้ว จากเพจ สมุทรปราการ ดูในคลิปเหมือนมีลูกค้าที่ซื้อต้นหอมแล้วมีผงสีฟ้าอยู่บนต้น เอามือลูบแล้วสีฟ้าก็ติดตามมือมา เลยเตือนภัยว่า มันผสมสี มา คนกินระวังอันตรายด้วย
จริงๆ แล้วสีฟ้าพวกนี้เป็นสารเคมีทางการเกษตร เช่น สารป้องกันเชื้อรา ที่เขาใช้ฉีดพ่นบนพืชผักอย่างต้นหอมครับ ซึ่งแม้จะไม่ค่อยมีความเป็นพิษ แต่ก็ควรจะล้างออกให้มากถึงที่มากได้นะครับ
พวกสารสีฟ้าที่ตกค้างในต้นหอมนี้ มีคำอธิบายจากเกษตรกร (จาก https://kasetgo.com/t/topic/806) ว่าอาจจะเป็นพวกสารเคมีทางการเกษตรที่ใช้ใส่ลงไป แล้วตกค้างอยู่ ล้างออกไม่หมด เช่น ปุ๋ยเม็ดเคมี (ที่สีฟ้า) หรือสารป้องกันกำจัดโรคพืช ตัวอย่างเช่น สารโปรพิเนบ และสารคอปเปอร์ ไฮดรอกไซด์ ซึ่งถ้ารับประทานเข้าไปเพียงเล็กน้อย ก็คงไม่เป็นอะไร แต่ถ้าร่างกายได้รับในปริมาณมาก ก็อาจจะเป็นอันตรายได้
ดังนั้นเมื่อซื้อผักสดอย่าง ต้นหอม มาแล้วเจอลักษณะที่ผิดปรกติ เช่น มีสารสีฟ้าอยู่บนผัก ก็ควรล้างออกด้วยน้ำเปล่าให้มากที่สุด (หรือแช่น้ำที่ละลายผงเบกกิ้งโซดา ก่อนจะไปล้างออกด้วยน้ำเปล่า) เพื่อให้มั่นใจว่าไม่ได้รับประทานเอาสารเคมีที่ตกค้างเข้าไปในร่างกายครับ.
ขอบคุณ แฟนเพจ อ๋อ มันเป็นอย่างนี้นี่เอง by อาจารย์เจษฎ์
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