男人J桶进女人P无遮挡全过程 -少妇人妻偷人精品无码视频-年轻18GAY白嫩青少年-来一水AV@lysav

WS1504 online automatic water quality monitor for total phosphorus content

Product overview
The potassium persulfate oxidation-ammonium molybdate spectrophotometry is adopted for WS1504 online automatic water quality monitor for total phosphorus content. Under neutral conditions, potassium persulfate is used to digest the water sample to be tested, and all the phosphorus contained is oxidized to form orthophosphate. In an acidic medium, orthophosphate reacts with ammonium molybdate to generate phosphomolybdenum heteropolyacid in the presence of antimony salt, which is immediately reduced by ascorbic acid to form a blue complex. This substance has a maximum absorption at 700nm. According to the Lambert-Beer law, the total phosphorus content in the water sample is measured through the photoelectric colorimetric method.
Performance characteristics
GB 11893-89 Water Quality - Determination of Total Phosphorus - Ammonium Molybdate Spectrophotometric Method is adopted.
The unique three-stage precision photoelectric metering device is used to realize fast and accurate reagent extraction and greatly reduce the impact of peristaltic pump tube aging;
the precise temperature compensation algorithm and ambient light elimination measures can keep the accuracy consistently regardless of in spring, summer, autumn and winter;
highly reliable reagent selection valve and digestion bottle assembly has a low failure rate and much lower maintenance workload;
the functions of complete digestion pressure testing protection, temperature protection and liquid leakage alarm can guarantee safe operation of the equipment.
Industry application
Sewage treatment plant, corporate sewage outlet
https://api.whatsapp.com/send?phone=8613339102201 https://api.whatsapp.com/send?phone=8613586823203 国产一产二产三精华液| 十九岁日本电影免费完整版观看| 国产中老年妇女精品| 末成年娇小性色XXXXX| 97精品人妻一区二区三区香蕉| AA片在线观看视频在线播放| 一本大道AV伊人久久综合| 国产婷婷色一区二区三区| 欧美性猛交XXXX免费看| 国产精品扒开腿做爽爽爽视频| 久久影院看电影的网站推荐| 香港三日本8A三级少妇三级99| 少妇BBW搡BBBB搡BBBB| 精品国产乱码久久久久久郑州公司| 久久久久亚洲AV无码专区网站 | 欧美老妇交乱视频在线观看| 精品人妻久久久久久888| 久久精品国产欧美激情无码| 色综合AV综合无码综合网站| 国产中年熟女高潮大集合 | 无码精品AV久久久奶水| 成人国产亚洲精品A区天堂蜜臀| 国产成年无码久久久久毛片| 亚洲AV无码专区在线播放中文| 蜜臀AV性久久久久蜜臀AⅤ| 极品少妇XXXX精品少妇偷拍| 欧美XXXX黑人又粗又长精品| 国产精品久久久久久无码 | PPYPP| 色综合久久久无码中文字幕波多| 日日碰狠狠添天天爽超碰97久久| 最刺激的交换夫妇中文字幕| 人妻AⅤ无码一区二区三区| 成人欧美一区二区三区黑人| 粗大的内捧猛烈进出在线视频 | 久久精品国产亚洲AV高清热| 人妻少妇AV中文字幕乱码| 久久久GOGO无码啪啪艺术| 国产男女做爰猛烈叫床小说| 高潮又爽又无遮挡又免费| 人妻人人澡人人添人人爽|