鋁卷生產要經過一系列的處理，在這個過程中會產生一部分工業廢水，這些廢水排出后，都會流入江河海。但是這些廢水中含有很多的金屬離子，有些是對人體有害的，要經過處理才能夠終排除。那么要如何檢測處理廢水中的金屬離子呢?
Aluminum coil production needs a series of treatment. In this process, some industrial wastewater will be generated. After discharged, these wastewater will flow into rivers and seas. However, these wastewater contain a lot of metal ions, some of which are harmful to human body, and can be finally eliminated only after treatment. So how to detect and treat metal ions in wastewater?
Na離子的含量是通過測定堿的量來推算，用酚酞作指示劑，鹽酸標準溶液滴定至溶液的紅色消失為終點，由消耗的鹽酸量計算氫氧化的量，從而算出鈉離子的含量。2價Na離子的含量采用在檸檬酸鹽的氨性介質中，用丁二酮肟顯色，在450nm處測定其吸光度，以純鎳作標準曲線，計算其含量。

The content of Na ion is calculated by measuring the amount of alkali, using phenolphthalein as indicator, titrating hydrochloric acid standard solution until the red of the solution disappears as the end point, and calculating the amount of hydrogen oxidation from the amount of hydrochloric acid consumed, so as to calculate the content of sodium ion. The content of divalent Na ion is developed with dimethylglyoxime in the ammonia medium of citrate, the absorbance is measured at 450 nm, and the content is calculated with pure nickel as the standard curve.
有社會責任感的鋁卷生產廠家都會主動檢測自身廢水中的金屬離子，在確定其含量不會對人體造成大的傷害之后，才會將廢水排出。同時，政府也將對鋁卷生產的企業進行監測，保證對環境和人民人身安全的保護。
Aluminum coil manufacturers with a sense of social responsibility will actively detect the metal ions in their own wastewater and discharge the wastewater only after determining that their content will not cause great harm to human body. At the same time, the government will also monitor the enterprises producing aluminum coils to ensure the protection of the environment and people's personal safety.