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買海鮮不擔心I一次教你如何清洗二氧化硫跟甲醛

辦年貨、買海鮮擔心二氧化硫殘留。一次教你如何清洗二氧化硫跟甲醛。

食安再爆,蝦子二氧化硫超標,如何清洗呢?毒蝦主要是因為黑心加工與保存不良,都有可能導致蝦子殘留二氧化硫跟甲醛,二氧化硫過量恐致噁心、嘔吐、腹瀉及過敏,甲醛被世界衛生組織認定為一級致癌物,長期暴露會引起腸胃道不適,提高鼻咽癌、血癌等風險。

新聞再爆,【更新】毒蝦竄全台 頂好、大潤發、家樂福中鏢

如果大家買到毒蝦怎麼辦?難不成要拿去退,來得急嗎?
毒蝦主要是因為黑心加工與保存不良,導致蝦子殘留二氧化硫跟甲醛(大部分都是二氧化硫)。

applenews

二氧化硫是什麼?

二氧化硫為酚氧化酶的化學性抑制劑,抗菌性質佳,且具有還原劑的效果,能將氧化變色的物質褪色還原。蝦子在離開海水後,蝦頭跟蝦腳會出現色澤偏黑的現象,稱之為「黑變」,通常會被消費者評估蝦子新不新鮮的指標,因此,容易被不良業者作為漂白劑使用,讓蝦子反白,以維持產品賣相。

吃到二氧化硫會怎樣?

二氧化硫過量恐致噁心、嘔吐、腹瀉及過敏,有氣喘者易誘發急性呼吸困難;甲醛則被世界衛生組織認定為一級致癌物,長期暴露會引起腸胃道不適,提高鼻咽癌、血癌等風險。
其實不只是蝦子有二氧化硫殘留風險,過年常買的乾金針跟枸杞中藥材,也有殘留的危險,一樣也是可以把金針漂得更白,有助賣相。

食材挑選可以注意

蝦子的部分可以,只要未出現蝦殼軟爛、散發腥臭味等肉質腐敗的情況,都可以食用,不代表蝦子一定不新鮮。
金針的部分,勿選擇過分漂白的、顏色過亮的,並應選擇信用良好的攤商或商家,有完整包裝及標示的產品。

如何清洗二氧化硫

這邊來教教大家如何清洗二氧化硫跟甲醛。
相關研究指出,二氧化硫殘留量與其含水率有極大之變化

臺北市政府衛生局藥物食品管理處,專員胡淑芳指出清洗去除二氧化硫可以使用

1. 先以清水沖洗1遍,再用20倍的水量浸泡(清洗的物品1:浸泡的水20)。
2. 水的溫度可選擇20℃以上,最適宜的溫度則在45℃。
3. 因為二氧化硫是水溶性,當浸泡10分鐘後,換1次水,浸泡過程約20~30分鐘,換1~2次水即可。
4. 最後再以清水清洗一次即可。

這樣的處理方法,亦可使二氧化硫殘留量去除達85%。

甲醛的部分,因為甲醛可溶於水中,所以用水清洗有助去除甲醛,此外,烹煮時的熱力也可助去除甲醛,因此應彻底煮熟食物至中心溫度達攝氏 75 度或以上。至于魚類,可查看魚肉是否已烹煮至不再透明及容易分開的情況。

建議食材最好烹煮全熟,並於烹煮時,可將鍋蓋打開,讓部分有害物質揮發,都是不錯的方式,可以減少二氧化硫與甲醛的殘留量,吃的也更安心。

資料來源:
去除二氧化硫 金針加水與醋浸泡
饗食出包!蝦子色偏白防二氧化硫
蝦子二氧化硫超標…大潤發、家樂福、頂好:去年已下架
亞硫酸鹽與二氧化硫
進口軟絲、墨魚驗出致癌甲醛! 清洗、徹底煮熟可去除
食物中的甲醛
薑絲、金針、中藥材二氧化硫超標,3個減少殘留好方法

作者: 淨毒五郎

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