使用冻干方法进行制造产品是由于它在溶液中不稳定。
Products are manufactured in the lyophilized form due to their instability when in solution.
磷钼蓝法测定水中总磷，所用的抗坏血酸溶液很不稳定，只能保存数周。
When determining TP of water using Phosphorus Molybdenum Blue Method, ascorbic acid solution was unstable, can only be kept for several weeks.
性状：黑棕色粉末，溶于水，溶液不稳定。
Porperties: Black palm powder, solve in water, water solution is.
虽然它能溶于酸溶液中，但会发生降解而不稳定。
Though it is soluble in the acid solution, it can be degraded and isn't steady.
结论姜黄素无水乙醇溶液对光不稳定，在光照作用下发生降解。
Vanillin was the main photodegradation product. CONCLUSION Curcumin in absolute alcohol exposed to light is instability.
由于标准亚锡溶液不稳定，提出了用高锰酸钾滴定法标定标准亚锡溶液。
Known as the unstability of the stannous solution, potassium permanganate process was used to standardized it.
由于标准亚锡溶液不稳定，提出了用高锰酸钾滴定法标定标准亚锡溶液。
Known as the unstability of the stannous solution, potassium permanganate process was used to standardized it.
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