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碘鹽、亞硝酸鹽的鑒別

碘鹽鑒別

優(yōu)質(zhì)碘鹽,顏色潔白,結(jié)晶整齊一致,堅硬光滑,呈透明或半透明,不結(jié)塊,無吸潮現(xiàn)象,無雜質(zhì),用手抓捏呈松散狀;入口咸味純正,無氣味;外包裝字跡清晰,袋質(zhì)較厚,封口整齊嚴(yán)密。假冒碘鹽,用手抓呈團狀,不易松散;有刺鼻氣味;口嘗咸中帶苦澀味;外觀常呈淡黃或晴黃色,易受潮;外包裝粗糙,包裝袋字跡模糊,手搓易掉,封口多為手工操作,不嚴(yán)密。

亞硝酸鹽的鑒別

有一種常用的化學(xué)原料亞硝酸鹽與食鹽很相似,誤食后會引起中毒。兩者的區(qū)別是,亞硝酸鹽的顆粒形態(tài)不是正方體,色偏黃,透明感更強,品嘗有明顯苦澀感。要注意食鹽外包裝上的標(biāo)示是否正確無誤,這一點非常重要,切不可馬虎。在日常生活中,經(jīng)常有誤食亞硝酸鹽而中毒的現(xiàn)象。
來源:名希特產(chǎn)網(wǎng) 關(guān)注:
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