How to choose the laboratory ultra-pure water equipment? At present, the laboratories of university research institutes and institutions basically use ultra-pure water machines instead of distilled water to make water, and the units above the municipal level in the eastern region have reached the level of popularization. Such as: environmental monitoring station, food and drug inspection office, disease control center, quality inspection office, agricultural soil and fertilizer station. Many enterprises' laboratories also use ultra-pure water machines instead of distilled water to make water, especially in the eastern region and the central and western regions. two. The water quality national laboratory standard water has three water levels: first grade water, second grade water and third grade water. However, most laboratories can use two kinds of water quality. One is tertiary water, such as distilled water, used for cleaning glassware. The second is primary water, which is mainly used for chemical analysis or precision instrument analysis such as liquid phase and atomic absorption. Customers should choose the grade of ultra-pure water machine according to the actual water quality requirements. The ultra-pure water machine with tap water as the water source has two (two water quality) outlets, one is pure water, that is, three-stage water; the other is first-grade water, that is, ultra-pure water (strictly speaking, first-grade water) The resistance is greater than 10 megohms, while the resistance of ultrapure water is greater than 18 megohms. 2. Types of Instruments Customers can choose ultra-pure water machines depending on the type of instrument used. The resistance of the liquid phase water is greater than 18 megohms; and the organic matter is removed; the atomic absorption, atomic fluorescence and environmental monitoring instruments use more than 18 megohms; the life science equipment such as PCR requires sterilization in addition to the resistance greater than 18 megohms. In addition to organic matter, in addition to heat. CPE is the sub-data of saturation high grade (FEN), the appearance is white powder, non-toxic and odorless, with excellent weather resistance, ozone resistance, chemical resistance and aging resistance function, with excellent oil resistance, flame retardant and coloring function. Excellent toughness (still flexible at -30℃), excellent compatibility with other polymer materials, high differentiation temperature, differentiation to produce HCl, HCl can catalysis CPE dechlorination reaction. Good Disposable Cpe Gloves,Disposable Gloves Wholesale,Surgical Disposable Gloves,Reusing Disposable Gloves Shandong Haoyue Medical Technology Co., Ltd , https://www.haoyueyiliao.com
For many customers nowadays, when purchasing laboratory ultra-pure water machine, ultra-pure water equipment, water treatment equipment, deionized water equipment, it is not very clear what type of laboratory ultra-pure water machine, ultra-pure water equipment, Need the following article for your reference!
Compared with electric distilled water or buying water outside, the laboratory ultra-pure water machine provides more benefits and convenience. It has been recognized by the majority of chemical analysts in the national market, but the instrument is the foundation of the laboratory. Equipment, although there are many technicians using ultra-pure water machines, but their understanding of ultra-pure water machines is not much, often there are misunderstandings in the purchase. How to choose the ultra-pure water machine suitable for this unit, please refer to the following content, I hope to help you.
one. Water consumption The current ultra-pure water machine on the market generally produces 5-40 liters/hour, and 40 liters or more is a non-standard model. The customer should select the specifications of the ultrapure water machine according to the actual water consumption, and generally follow the principle of 2 times relationship. If the water consumption is 20 liters/day, the machine with the specification of 10 liters/hour is used. If the specification is too small, the consumption of the ultra-pure water machine will be very fast, and the selection specification is too large, which will result in waste. If the concentrated water consumption is large, you need to buy a larger pure water bucket, otherwise the water can't keep up.
Most customers are not clear about their water quality requirements. Although the relevant national departments have various water quality standards, they do not have complete quantitative indicators for specific experimental projects or instrumental analysis. It is often found after purchasing ultra-pure water machines. not to standard.
According to experience, you can follow the following purchasing principles and respond accordingly.
1. The experimental content is divided into inorganic experiments and organic experiments. Inorganic experiments only need to have a water quality of more than 18 megohms, while organic experiments usually remove organic substances in water, so in addition to the resistance greater than 18 megohms, the total organic carbon is needed. . If it is a biological experiment, it is necessary to remove bacteria from the water.
3. Current water source If the customer's current water consumption is qualified, the source of the pure water can also be informed to the ultra-pure water machine manufacturer, and the technician will recommend the corresponding specification model according to the situation.
The above three principles are based on actual application experience and can be referenced, but the most accurate model selection is to provide detailed water quality parameters such as resistance, trace elements, bacteria, and total organic carbon levels.
three. Raw water quality customers must provide the manufacturer with the water quality status of the raw water when purchasing the ultra-pure water machine, such as more sediment, high hardness, groundwater, etc. The process of the ultra-pure water machine is determined according to the quality of the raw water. There are many kinds of sediments, and it is necessary to add a pretreatment device. The hardness is high, and a softening device is added. The salt content is high, and a two-stage reverse osmosis process is used. If you choose an ultra-pure water machine that uses pure water as the water source, you only need to provide water quality requirements and water consumption.