To identify whether the water purified by the water purifier is qualified, there are the following methods:

1. Test the residual chlorine in the water: first prepare the residual chlorine test agent, and then prepare two cups 15ML water, one cup is purified water, one cup is ordinary tap water. Add 2 drops of residual chlorine test agent to the two cups of water respectively, and the color of the water will change. There is a residual chlorine color comparison card on the instruction manual of the residual chlorine test agent. , find the corresponding color pattern according to the color of the water, and you will know the content of residual chlorine.

2. Detect organic matter, bacteria and viruses in the water: It is not only residual chlorine that affects water quality, but also pollution such as organic matter and heavy metals. To detect whether these contaminations have been removed by the water purifier, we need to use to the water quality electrolyzer. The lighter the color of the water, the better the water quality, and vice versa. We can also compare the color of the water with the color on the electrolyzed water quality manual to determine which impurities are in the water.

3. TDS value detection: There is another tool in the world for testing water quality - TDS pen. Let's first understand the concept of TDS. TDS is the total amount of dissolved solids, in mg/L. The more solids dissolved in the water, the higher the TDS value of the water and the worse the water quality. Extended information

Notes on the use of water purifiers:

1. The ultrafiltration membrane filter element should always be kept moist after use. If the ultrafiltration membrane filter element dries out, it will cause a sharp drop in water production that cannot be recovered.

2. If the water purifier is not used for more than three days, when it is used again, the water purifier should be flushed repeatedly for 2-5 minutes until the water in the water purifier is drained.

3. When the tap water is out of service, please turn on the sewage switch to drain away the sediment, rust, etc. in the tap water pipe, and then turn on the purification faucet to use purified water.

4. The total water production of the water purifier is related to the incoming water quality of the water purifier. If the incoming water quality of the water purifier is good, the total water production will increase. Otherwise, the incoming water quality will be poor. The total water production will decrease, and the corresponding filter element service life will be slightly shorter.

Reference source: Baidu Encyclopedia-Water purifier (including water quality testing)