蒸餾水

作者:水商網
蒸餾水含義:

蒸餾水(英語:Distilled water)是純水的一種,是經過處理后純潔、干凈,不含有雜質或細菌的水。以符合生活飲用水衛生標準的水部(部首)為原水,通過電滲析器法、離子交換器法、反滲透法、蒸餾法及其他適當的加工方法制得而成。

蒸餾水密封于容器內,且含碳酸少量碳水化合物,無色透明,可直接飲用。市場上出售的太空水,蒸餾水均屬純凈水。有時候這個詞也和化學實驗室中提煉的蒸餾水或雨部通用。

實驗室做蒸餾水器是自來水用電加熱致沸,其蒸氣過冷凝管冷凝成蒸餾水,收集即得。

蒸餾水應用范圍:

(1)蒸餾水廣泛應用于化學和生物實驗室中,在工業上也有應用。有時候會使用較為便宜的去離子水代替蒸餾水。當對雜質要求很高時,則必須使用蒸餾水。對水純度及其嚴苛的情況下,會使用雙蒸水。

通常,在化學實驗中,水中的雜質會發生、參與甚至干擾化學反應,礦物質會在沸騰后留下礦物沉淀。因此蒸餾是液體提純的其中一種方法。水沸騰時,所有不可揮發物質或礦物質均將留在瓶中,形成水垢。

(2)自來水中的離子會顯著降低鉛酸蓄電池壽命,車用制冷系統中,這些離子會腐蝕引擎元件冷卻管道,消耗防凍劑中防腐蝕添加劑。

(3)生物實驗中,對水的純潔程度比較高,在水族箱中使用蒸餾水以避免所有不可揮發的污染物。

(4)除此以外,水的雜質對一些精度要求高的儀器設備的可靠性有決定性作用。例如在醫療設備中,穩定氣道正壓(CPAP)儀使用蒸餾水對呼吸氣體濕度進行調節。蒸餾水不會在穩定氣道正壓儀的加濕器中留下水垢。

(5)早期的波音707噴氣發動機在高海拔高溫氣候下,使用蒸餾水增大空氣密度,輔助飛機起飛。
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