Water is a frequently overlooked, but vital, reagent in the laboratory. The hospital laboratory is no exception. The water used in the laboratory is mainly water for biochemical analyzers and a small amount of water for immunization. Here mainly talk about how to supply pure water to the hospital's biochemical analyzer.
First, the characteristics of pure water used in biochemical analyzer
1. Characteristics of water quality
The less non-interfering elements that biochemical analyzer equipment can monitor when analyzing chemical element content, the better. Therefore, the pure water meter is required to ensure the quality of the water, and some biochemical analyzers have their own detection devices. Nowadays, some manufacturers of pure water meters on the market are equipped with water quality monitoring to ensure the quality of pure water. The amount of water used in each biochemical analyzer is generally 10-100L/H. The water quality of the water is 1MΩ.cm according to the CAP and the Clinical and Laboratory Standards Institute (CLSI). About 10MΩ.cm.
2, biochemical analyzer requirements for pure water machine
Due to the particularity of the hospital's laboratory. The requirements for the matching pure water meter are different from those of the ordinary pure water machine:
A, the required water tank is 60-250L, or even 500L, to facilitate water consumption at peak times;
B. The water storage tank is required to have both pressure and no pressure, but it must be closed, and it can be supplied by gravity, water supply or pressure pump. It doesn't matter if the biochemical analyzer has a water inlet solenoid valve or a pump.
C, in the large-volume inspection department, the site is also very valuable, so the built-in water tank will go further.
D, It is convenient and quick to replace the consumables of the pure water machine, and the maintenance is convenient.
E, the amount of consumables required for the pure water machine should be large, reducing the frequency of replacement; depending on the amount of water used to determine the size of the purification tank, directly determine the frequency of replacement of the consumables, preferably the EDI system.
F, the RO system of the pure water machine is required to be configured as a two-stage system, because even if the DI (purification column) fails, the two-stage RO can basically guarantee the water supply.
G, Require pure water machine For areas with high water hardness, soft rubber cans can be selected. If the raw water is poor, you can also choose quartz sand filter tank or 20" three-stage strengthening pretreatment.
H, requires the pure water machine to move, equipped with pulleys.
Second, the hospital chooses pure water meter precautions
Generally speaking, the pure water used in the biochemical analyzer should ensure the water supply quantity, then the water supply quantity refers to the water supply amount from the water tank to the biochemical analyzer. The amount of water produced is the amount of water from tap water to RO water, called water production. To meet the water needs of the biochemical analyzer. Need to pay attention to 4 points on the amount of water.
1. The water production of the RO membrane will decrease due to the decrease of the temperature. If the ambient temperature is lowered by one degree, the water production of the RO membrane will decrease by 3%. Therefore, when the biochemical analyzer is matched, it needs to be doubled and needs 10L/H. Then configure 20L/H. (Note: Now the manufacturer of the water machine is generally named after the water volume of the RO membrane or defines 10L/H)
2. For example, Olympus's AU800 requires 70L/H of high-purity water. If there are 2 sets, it needs to be configured with a larger water tank. It needs 140L of high-purity water per hour. At this time, choose a pure water machine with 150L per hour. The amount of the water tank is preferably 150-200L. Or a bigger water tank, otherwise it doesn't make sense.
3. If the customer's biochemical analyzer water supply requirement is 2 hours of peak water use, each biochemical 100L/H, a total of 2 sets. This means that 400L of water is needed within 2 hours. A total of 500L is required within 2 hours of immunization or some other water use. At this time, choose the pure water machine and the matching water tank. You can choose a high-priced water production 250L/H, with a 250L water tank pure water machine, of course, this machine is enough for two hours a day; you can also choose one 150L / H, with 500L water tank, the water supply pump of the water tank should reach 250L per hour, so the price is more affordable, the pure water machine works 4 hours a day.
4, the configuration of the purification tank or purification column must be large, regardless of the machine or stand machine, it is best to have 25L-100L of purified resin, otherwise the replacement time is extremely short. In general, 1L resin exchanges 2000L of pure water. If your water consumption is 250L/H, 8 hours a day, then the daily water consumption is 2000L. If you configure a 50L purification tank, you can only use 50*2000L= 100000L. That is to say 100000L/2000L/day = 50 days. It is necessary to change consumables in less than 50 days. It is definitely not enough for the busy workload of the hospital. In this case, at least 100L of purification tank should be configured.
Third, the water consumption of the biochemical analyzer
At present, there are many kinds of biochemical instruments on the market, and the amount of water is different. Generally speaking, the domestic biochemical analyzer uses less than 40L, and the Japanese and American biochemical analyzers range from 20-100L. Here's a simple example:
Beckman DX series, 20L/H;
HITACHI7980 series, 40L/H;
Toshiba TBA-120FR series, 45L/H;
Olympus AU2700 series, 45L/H;
Fourth, the laboratory biochemical analyzer supporting pure water market analysis
Biochemical analyzers range from tens to millions of dollars, and water consumption varies depending on the size of the hospital. Hospital procurement is mostly accompanied by biochemical instruments to purchase pure water meter. This sales model determines the decisive role of biochemical instrument manufacturers or biochemical agents in the selection of pure water machine. Secondly, if the hospital purchases separately in the later stage, it is generally more than two biochemical instruments purchased by the hospital. It needs a central water supply machine. Whoever truly understands the user's needs will do well in this market. There are several Millipore, ELGA neutral machines and Heal Forces on the market.
Heal Force's main advantages are integrated design, built-in 300L open mold water tank, imported pump, membrane components, exclusive reverse osmosis measurement control system, patented conductivity sensor to correct conductivity sensor constant, using two-stage reverse osmosis guarantee Even if the resin fails, it will meet the water inlet requirements and will not cause the inspection department to stop working. No need to replace the pre-filter to save consumables; large-capacity resin tanks and electrodeionization systems are available. Replacing consumables is convenient and fast. It can be described as a true customer-oriented design concept and advanced scientific technology, providing the inspection department customers with convenient, beautiful and excellent performance equipment.
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