In pharmaceutical industry enterprises, in accordance with the requirements of GMP standards, it is necessary to enforce the quality certification and legality of production equipment, production systems and production processes. In addition, the production environment of pharmaceutical companies (including air and indoor space) also has an important impact on product quality. Therefore, the sanitary quality of the clean room must also be measured and identified.
Within the framework of the hygienic metrology calibration, it is necessary to determine which measurement points are available and which devices must be metered and tested so that the calibration can be performed regularly. For the clean room in the pharmaceutical production process, the measurement of different detection indicators must be carried out on the equipment in the clean room in accordance with the provisions of Annex C of ISO 14644-3. In the measurement and measurement, important measuring instruments include: particle counter, aerosol detector, flow detector, differential pressure detector, thermometer and hygrometer. Different sensor systems with suitable detection accuracy will be used for different detection quantities. In addition, in accordance with the requirements of the GMP standard, all testing instruments require periodic calibration. The standard stipulates that the calibration period of various testing instruments is 12 months. The technical feasibility in Annex C of the ISO 14644-3 standard has been converted into a feasibility test for technical implementation in the GMP standard.
Basic information for measurement calibration
The main basic concepts of metrology calibration are:
- metrological calibration: comparing the measured value with the standard value under specified conditions;
- Correction: adjustment of small differences in Zui;
- Unit of measurement: The unit specified for the testing equipment;
- Compliance: the correspondence between the data obtained during the continuous measurement process and international standards;
- Unreliability of detection: A parameter related to the measurement result and the magnitude of the measurement value identified by the detection control system.
Under normal circumstances, the compliance is indicated by a certificate of certification issued by a different level of national certification body. For example, obtaining the DKD certification certificate means that the specified requirements are met within the scope of the DKD standard, because the DKD certification is approved by the international standard certification and approval department. The purpose of metrological calibration is to verify the consistency of the object being tested with the specific criteria. Only when the detection error and the unreliable coefficient of detection are less than the specified value, the certificate of conformity certification can be obtained. In the measurement inspection, according to the requirements of the special technical specifications of the tested object, the ratio of the unreliability of the measurement and the detection error shall be 1:3. That is to say, factors that detect unreliability should be considered when judging the results of the measurement calibration.
Selection of testing instruments
In the Annex C of the ISO 14644-3 standard, the measuring instruments selected for the measurement and calibration in accordance with the ISO 14644-3 standard are given.
temperature
When performing room temperature monitoring, a resistance thermometer or a thermistor should be selected as the temperature sensor. The required detection accuracy is 0.5 °C. In today's production site or DKD metrology calibration, the metrological inspection accuracy that can be achieved is 0.1 to 0.2 °C. In Germany, there are more than 30 qualified DKD metrology calibration laboratories.
Relative humidity
According to the requirements of ISO 14644-3, a humidity sensor with a thin-coated capacitor or a sensor should be used for relative humidity detection. The detection accuracy of such a relative humidity sensor is required to be 2% to 3% of the RH value. Therefore, in the measurement calibration, the unreliability required for detection is about 1%. In Germany, there are not many laboratories qualified for relative humidity measurement calibration, but it is sufficient for customers who require relative humidity measurement calibration.
Pressure difference
In order to measure and monitor the pressure difference between the clean rooms, it is necessary to measure within a low differential pressure range (5 to 25 Pa). Starting from 20 Pa, a more accurate pressure balance must be used for metrological calibration. In the low pressure range, in many cases the consistency can only be used to estimate the consistency. Only a handful of laboratories can perform metrological calibration of low pressure differentials.
Testo Industrial Services LLC has developed a new low pressure differential pressure measurement calibration method. They use DKD approved wind tunnel equipment. The principle is that a certain pressure drop will occur after the airflow passes through the wind tunnel. By adjusting the flow of air flowing through the wind tunnel, a stable pressure difference can be obtained at the exit of the wind tunnel while maintaining the same air flow. The pressure difference generated is about 5 Pa at an air flow rate of 3 m/s, and the measurement error is 0.2 Pa; this precision fully satisfies the requirements for metrological calibration of commonly used pressure sensors.
Air flow rate measurement
There are also high requirements for the measurement of the airflow rate. According to the requirements of ISO 14644-3, hot wire anemometers, ultrasonic anemometers and impeller anemometers suitable for low pressure airflow detection should be used. Frequently done is the metrological calibration of an anemometer with an air flow rate in the range of 0.45 m/s. The results of the metrological calibration must prove that the anemometer's error is within ±20%. This requirement is difficult to achieve because the specification of the air anemometer in this case is 0.12 m/s in accordance with the requirements of the ISO 14644-3 standard. In this case, only comparative metering calibration can be performed to obtain a higher safety factor. At present, the measurement accuracy of three DKD metrology calibration laboratories in Germany has reached 0.1m/s.
Particle content
The calibration of the particle content measuring instrument is more difficult. The allowable error of the particle content detection instrument shall not exceed ±20%. At present, the DKD measurement calibration laboratory is not able to carry out calibration work in this area. The metering calibration of the particle counter can only be performed at the instrument manufacturer. In accordance with the requirements of the ISO 17025 standard, the Federal Competent Authority can provide you with an observation method for the unreliability of the metering and calibration of particle size detectors developed in Switzerland. The unreliability of the metering calibration of the particle content detector is relatively large (about ±10%) at low particle content, so it is difficult to prove that the standard specification of ±20% has been met. That is to say: At present, in the measurement calibration of the particle content detector, the traceability of the calibration result is still insufficient.
Summary: In general, the calibration of temperature and relative humidity testing instruments has sufficient inspection accuracy. In the low-speed air flow rate range of 0 to 1 m/s, due to the unreliability of the measurement results of the air anemometer, the number of units capable of performing such calibration of the measuring instrument is too small. The measurement calibration of the differential pressure detector with a pressure difference of 0 to 20 Pa is also similar to the air flow rate detector. For the measurement calibration of the particle content detector, there is currently no measurement calibration unit authorized by DKD.
Shanghai Sujing Industrial Co., Ltd.
　　
If you have any needs, you can always pass with me, thank you very much for your support to Sujing, look forward to working with you.
　　
have a pleasant workday!
　　
Thankyou & Bestregard!
　　
SUJING—JINGHUA
The United States Food and Drug Administration (FDA) has published the Dietary Supplement Health and Education Act (DSHEA), which provides for dietary supplements. A product (other than tobacco) intended to supplement the diet may contain one or more of the following dietary ingredients: A vitamin, a mineral, an herb (herbal) or other plant, an amino acid, a food component used to increase the total daily intake to supplement the diet, or a concentrate, metabolite, component, extract or combination of the above ingredients, etc. It also includes approved new drugs, vitamins or biologics that have been marketed as dietary supplements or food products before they are approved, issued or licensed. The DSHEA defines dietary supplements as their composition and labeling requirements: the product form may be pill, capsule, tablet or liquid; The product shall not be used as a substitute for ordinary foods or as an exclusive dietary item. The product shall be labeled as a "dietary supplement".
Dietary Supplements,Arachidonic Acid Powder,Kava Root Powder,Kava Root Extract Powder
Xi'an Double H Health Technology Co., Ltd , https://www.xadoubleh.com