The blog
H2O2 absorption, on the catalytic sensor, steam injection rate and so on...
Life science
Recent online seminar questions and answers about hydrogen peroxide biological purification
If you cannot attend the online seminars, you canAt any time to watch it.Online seminar we didn't answer some questions, answer them one by one here.
Quick survey - how do you measure hydrogen peroxide?
Please answer the four questions about your current use of technology and you what level of PPM concentration measurement.
Online seminar questions and answers:
Question:
You have the test material to absorb H2O2The solution?
Answer:
We in the developmentHPP270 series(HPP271 and HPP272) probe was tested several material, in order to choose not only absorb or decomposition of H2O2 sensor materials.HPP271 and HPP272 probe is used for high level process, so it's not used to test the customer material may be absorbed in H2O2The study of the (exhaust).
Question:
Can you illustrate how the pressure and temperature in the process of biological purification of change?
Answer:
inPowerpoint slides, please refer to the slide 13, it shows in the isolator of a typical non-condensable biological purification process.
If you use the hot air to reduce the humidity, is usually elevated temperature in the dehumidification phase.And, in the air conditioning and biological purification stage, as the heating steam injected indoor hydrogen peroxide, temperature rises.In biological purification stage pressure maintain at the same level, but it is usually slightly higher pressure than the isolator surrounding area.
Question: why are there no other RH sensor showed higher catalytic layer value?These sensors without catalyst layer sensor is the same with you?
Answer:
heatingPEROXCAPSensors can prevent the formation of condensate on the sensor.So even under the condition of condensation can provide a reliable measurement.In addition, the sensor has chemical clearance function, can help in adverse H2O2Environment keep the measurement accuracy.Clear functions involved in rapid heating sensor, in order to eliminate possible pollution.H.PP272 探头提供两个不同的湿度值：相对湿度 (RH) 和相对饱和度 (RS)。
Relative humidity is a catalytic layer from the beltHUMICAPDirect measurement of value.However, the relative degree of saturation from relative humidity, H2O2To calculate the parameters and temperature.
Question:
In a controlled area on H2O2(35%) during the evaporation, the relative degree of saturation and relative humidity and the PPM level of saturation have what relation?
Answer:
You can use different H2O2Liquid to generate H2O2Steam, such as, the use of electric heating plate.Liquid hydrogen peroxide H2O2The higher the concentration, the less water vapor.So, you can put more H before condensation2O2Into the interior.The generated hydrogen peroxide vapor PPM level and temperature can affect the humidity level.
Please refer to thePowerpoint slides 30th to 43.These slides show different temperature and H2O2Vapor concentration affect how different humidity levels (relative humidity, and relative saturation).
Please see thepowerpoint30 - slide to 43.This diagram shows different H2O2PPM concentration and temperature of RH % value.
Question:
Can you more detailed visa materials used in the hydrogen peroxide sensor?Whether you can refer to the 50th slides here?
Answer:
Different manufacturers of sensors with different materials.As we spoke today in the online conference, proximal sensing element material choice is very important to realize accurate and repeatable measurements.In the development stage, visa for measuring probeHPP271 and HPP272All materials used in a large number of tests.We just choose not to absorb or decompose H2O2Steam materials, such as steel and ptfe.
From a user's point of view, this is crucial;Especially when it comes to the biological purification of isolator or interior contains a lot of absorption and release or decomposition of H2O2The material of steam.If so, in order to achieve stable H2O2Steam conditions difficult, ventilation phase may extend, because the gas evolution.
Question:
Why humidity sensor containing catalytic filter?
Answer:
According to the definition, the relative humidity is concluded that the water vapor content after measurement.Can be H HPP270 probe of the catalytic layer2O2Decomposed into water and oxygen.Therefore, only steam reach the catalytic layer under humidity sensor.
Vaporization of hydrogen peroxide is a kind of dangerous chemicals, corrosion can be a lot of material, especially when process includes condensation.This is a few hydrogen peroxide sensor manufacturer in the humidity sensor contains the cause of the catalytic filters or layer, so that we can protect the sensing element.H.2O2Is catalytic sensor indicates the humidity only caused by steam pressure.No catalytic filter humidity sensor with H2O2Steam environment happen quickly drift, so we can not provide reliable measurements.
Question:
I am currently using hydrogen peroxide to perform measurement just for monitoring purposes.Someone USES hydrogen peroxide measurements to control the hydrogen peroxide injection rate?
Answer:
Currently, most users will only H2O2The PPM value for monitoring purposes.However, you can use reliable and repeatable measurements to control the H2O2Injection rate, so that H2O2PPM level remained stable in the biological purification stage.
In addition, when necessary can use relative saturation measured value to control and avoid condensation.Several companies use measurement of H in biological purification stage2O2The PPM value to control the H2O2Injection rate.We have seen a growing number of companies in the use of H2O2Concentration and relative saturation value control of steam.
Question:
I need to have been monitoring the humidity - is not limited to biological purification stage.Can I use my visa to pull HPP probe to measure the humidity between two biological purification process?
Answer:
HPP272 probe applies not only to biological purification stage, also applies to the humidity measurement in the process of routine production.At the beginning of the biological purification stage air mixed gas condensation, displays HPP272 relative saturation values.There is no H2O2When is equal to % RH % RS.This means that in the regular production process, you can use the RH or RS parameters for humidity measurement and control.
HPP272 probe designed for use in a highly condensation of H2O2Environments.Therefore, it not only can be in biological purification stage but also in the process of production to provide reliable, repeatable measurements (RS, RH, H2O2The PPM, and T).
H.2O2
