How to ensure the accuracy of analytical data Intermediate (8) 2010.09.02 Class 3 Host Wang: For analysis, data is the product, and ensuring the quality of the product is the ultimate goal of every industry. What kind of product is good depends on the accuracy of data for analysis. Accurate data has a good guiding effect on production. Inaccurate data may cause equipment damage and production stoppage. For large factories, the losses are heavy. We also know that our factory will spend a lot of manpower and money every time it starts or stops, so we don’t want to cause unnecessary disputes due to data issues, so correct analysis and reporting of correct results are the responsibilities that our analysts cannot shirk. and obligations. For us, the quality inspection center is the quality inspection department of our factory. It is mainly responsible for the quality inspection of various imported raw materials and fuels, products between processes in the factory, and the quality control of outbound products. The accuracy of the inspection data is crucial to each production link. It plays a vital role in the smooth progress of the enterprise. At the same time, if the quality of various outbound products is guaranteed, it will establish a good external image and credibility for the enterprise and open up a broader market space for the development of the enterprise. Therefore, It is very necessary to ensure that the quality of various imported materials and outbound products is reflected in a timely and accurate manner. So how can we ensure the accuracy of the inspection data? What are the factors that affect the accuracy of the inspection data? Now let’s discuss it briefly. First, someone from the methanol post replied: I came into contact with the analysis of the methanol post relatively late. I am a new employee and I have to learn everywhere. Regarding the situation I have now, what I want to say is: parallel analysis is a test. A good way to analyze data accurately is, for example, when there is an abnormality in a data analysis, that is, it is different from the usual analysis, the analysis must be repeated once or twice. When it is determined that the sampling is correct, if it is rechecked several times, it is still the same. In the same situation as the first time, it can be judged that the analyzed data is correct. In this case, the analyst must contact the craftsman as soon as possible and inform him of the situation, so that analysis is the eyes of the craftsmanship. Xu went on to say: Zhang Lan is right. I came here earlier than she did. In addition to what she said, I think that to ensure the accuracy of the data, we must also have a qualitative understanding of the analysis project, so as to know what is happening and what is going on. Therefore, improve the accuracy of analysis with a clear understanding. Shen said: What Ju Xiang and Zhang Lan said are very good. What I want to say is: At present, the inspection methods adopted in the inspection operation area of ??the quality inspection center mainly consist of chemical analysis and instrumental analysis. First, in terms of chemical analysis methods, In short, the factors that affect the accuracy of inspection data mainly include the following aspects. First, check whether the test operating procedures comply with national standards. Whether the adopted operating procedures meet the needs of each analytical element of the material being inspected directly determines the accuracy of the inspection results, and plays a crucial decisive role in the accuracy of the analysis results. Therefore, it is necessary to choose a method suitable for each element. Only by analyzing the operating procedures of the project can the accuracy of the inspection data be ensured. At present, the various analytical methods used in the laboratories of our quality inspection center are basically performed in accordance with the operating procedures contained in the "Longyu Coal Chemical Industry Analysis Operating Procedures". This procedure is based on the engineering and technical personnel related to quality inspection. The relevant contents of national standards are compiled based on the needs of the Coal Chemical Industry Institute for inspecting various materials, and can basically meet the needs of inspection work. However, with the continuous updating of national standards and the gradual maturity of inspection methods, some of the original inspection methods involved in the "Coal Chemical Industry Inspection and Test Operating Procedures" are no longer suitable for the needs of inspection work and have been replaced by new analysis methods. In this case, it is particularly important to revise and improve the inspection and test operating procedures. The relevant technical personnel of the technical department of our quality inspection center, together with the relevant staff engaged in various inspection projects, have re-revised and improved the inspection and test procedures, and strive to follow the We have stepped up the pace of development of inspection methods to meet the needs of inspection work. The analysis methods used in inspections are all implemented with reference to the relevant content in the national standard. This eliminates the errors in inspection data caused by imperfect methods and fully guarantees the inspection of various materials. The accuracy of the data provides accurate and reliable quality reference information for other relevant production units. Second, check whether the various materials and equipment used meet the usage requirements. In chemical analysis, standard samples, chemicals, glass instruments, measuring instruments and various related equipment are used. Whether these materials and equipment meet the needs of inspection work directly determines the accuracy of the inspection data.

In terms of the chemicals used, because the quality levels of drugs produced by different manufacturers are inconsistent or the quality levels of different batches of drugs produced by the same manufacturer are different, acids are divided into superior grade pure and analytical grade. , chemical purity, etc. Different analysis methods have inconsistent requirements for the purity level of the drugs used. If the purity of the drugs does not meet the requirements, it may lead to deviations in the reproducibility of the analysis results of the same sample. Only chemicals can be guaranteed Only when the quality meets the inspection requirements can the inspection data obtained during the analysis process be accurate, ensure that the results of the analyzed samples are reported in time, and provide effective guidance for other related production links; in terms of glass instruments, beakers, measuring cylinders, cones Bottles, volumetric flasks, etc., whether the quality meets the inspection requirements will also have a certain impact on the accuracy of the inspection results. If the accuracy of a batch of glass instruments used in parallel is inconsistent or the quality level of glass instruments produced by different manufacturers is inconsistent, the calculated There will be certain errors in the results. Therefore, ensuring that the inspection measuring instruments meet the usage requirements can ensure the accuracy of the inspection data; in terms of the equipment used, such as muffle furnaces, balances, spectrophotometers, etc., whether the equipment meets the requirements The need for inspection work also has a certain impact on the accuracy of the inspection results. Regularly calibrate various equipment used in the inspection office to ensure that the equipment can operate normally and meet the needs of the inspection work, so that the accuracy of the inspection data can be guaranteed. By meeting the above requirements, systematic errors generated during the analysis process can be eliminated and the accuracy of the test results can be ensured. Third, whether the quality of employees meets the work needs. Due to the uneven quality of employees in the current inspection system, the understanding of inspection operating procedures may be inconsistent during the inspection process. At the same time, because the original training and employment system basically requires experienced laboratory personnel to lead new employees, there is no If you have received formal training in theoretical knowledge and practical operations, but do not have a good grasp of some operating methods in the inspection process, and cannot master the entire analysis step proficiently, this will have a certain impact on the accuracy of the inspection data. Now, the Quality Inspection Center has launched a learning year activity, regularly organizing employees to carry out training on business knowledge and other related content, which has greatly improved the professional quality and technical level of employees in each position. At the same time, it conducts an operational skills test every six months to train employees The improvement of the technical level has also played a positive role in promoting the technical level of relevant personnel to meet the needs of the inspection work of this position. This ensures the thorough implementation of operating procedures during the inspection process and carries out various quality inspections in full accordance with standardized operating methods. Inspection work has laid a solid foundation for providing accurate and reliable inspection quality information. Fourth, check whether the inspection environment meets the needs of the inspection work. During the inspection and analysis process, whether the environment meets the inspection requirements will also have a certain impact on the accuracy of the inspection data obtained from the assay. For example, the standard solution must be stored at room temperature to ensure that the concentration remains consistent within a certain period of time. If the temperature in the operating room where the standard solution is stored is too high or too low, the concentration of the solution will change, and the data obtained will be affected. To a certain extent, the accuracy of inspection data may not be guaranteed. Therefore, ensuring that the inspection environment meets work needs will eliminate the resulting systematic errors and ensure that the inspection data is accurate. Wu continued: Qiao Xing just discussed chemical analysis methods, so I will talk about some issues on improving accuracy from the perspective of instrumental analysis. Specifically, I think there are the following aspects. First, the performance of the instrument itself. Stable operation of the instrument is a necessary prerequisite to ensure accurate and reliable data. During the installation and debugging process of the instrument, engineers use the inspection materials in the production process to draw a standard curve according to the needs of the inspection work. The accuracy of the curve is directly related to the inspection data. Therefore, it is necessary to regularly check whether the curve drifts. For example, bottled standard gas is an important reference for measuring the accuracy of the chromatographic curve. Second, whether the routine maintenance of the instrument is in place. During the daily use of the instrument, due to the inconsistency of the analyzed samples, the curve may shift or rotate. Therefore, the curve of the instrument must be calibrated regularly. At the same time, some components inside the instrument and some commonly used spare parts may be affected by long-term operation. It needs to be replaced and repaired, such as the injection port of the chromatographic analyzer. During the process of analyzing the sample, the peak time of the instrument changes due to the damage or looseness of the septum. The only way is to replace or tighten the septum. Injection port nuts, etc., are required for the instrument to operate normally. Third, whether the environmental factors meet the instrument operation requirements. Fourth, sample preparation must meet inspection needs. Fifth, the staff engaged in instrumental analysis understand the instrumental analysis methods. If the practitioners do not have a good grasp of the technical procedures for instrument analysis and cannot carry out the instrument analysis process in accordance with the standards, it may have a certain impact on the accuracy of the inspection data. Therefore, systematic training must be carried out for the personnel engaged in instrument analysis so that they can fully master it. Instrumental analysis methods can ensure the accuracy of instrumental analysis results. Today's discussion is rich. Through this discussion, I believe that everyone has a deeper understanding of accurate analysis. I hope that everyone can think carefully and make progress together through this discussion, laying a good foundation for future accurate analysis. the basis of.