Reference samples: in international trade, the samples provided by the seller to the buyer are for negotiation reference only, which are different from the finalized samples in nature and should not be used as formal inspection basis.
Difference:
The standard sample has two characteristics:
1, with sufficient uniformity. Please note that it is not very uniform, but it is uniform enough. Because it is only to ensure the consistency of the application effect of technical standards in different spaces, that is, to meet the requirements of technical indicators in the preparation of standards.
2, very good. It's confirmed. Please note that it does not mean very accurate, but very certain, that is, it is required that this standard value is reliable. It is not required to be very accurate, as long as it meets the technical indicators in the text standard.
Reference sample: refers to the goods sent by the buyer and the seller to each other for the purpose of developing trade relations, which are only for the other party's understanding and are not used as the quality basis for trading or delivery. When sending reference samples, the words "for reference only" must be marked to avoid confusion with standard samples. This sample is not binding on both parties.
What is the difference between standard substance GBW and standard sample GSB? The difference between standard substance GBW and standard sample GSB lies in their different meanings and applications.
GBW: national standard material; As a "measuring tool" in the analysis and measurement industry, it is a substance or material with one or more sufficiently uniform characteristic values, which plays an indispensable role in the fields of calibrating measuring instruments and devices, evaluating measuring and analysis methods, measuring the characteristic values of substances or materials, assessing the operating technical level of analysts, and controlling the product quality in the production process.
GSB: national physical standard (standard sample); Standard sample is referred to as standard sample or physical standard for short. It is developed according to the needs of implementing and formulating writing norms. As a supplement to the writing standard, the physical object is a standard material represented by the standard reference material of the Institute of Traditional Chinese Medicine.
Characteristics of reference materials:
(1) The number of reference substances is related to the properties of substances, but not to the number and shape of substances;
(2) The standard substance has good reproducibility, can be prepared in batches, and can be copied after being used up.
(3) There are many kinds of reference materials, including thousands of reference materials with chemical components, and the limit range is 12 orders of magnitude;
(4) The certified reference material has strong practicability, and can be applied under actual working conditions, and can be used for calibrating measuring instruments and evaluating the accuracy of measuring methods, and can also be used for quality evaluation, measurement certification and measurement arbitration in laboratories.
What is a speaker standard sample? What is a speaker boundary sample? What's the difference between them? Boundary samples are the minimum of qualified products.
Operational matters of boundary samples
In practice, the following matters should be paid attention to in boundary sampling:
(1) Generally, the boundary samples are made in duplicate, one for the supplier and one for the customer, which shall be verified and signed by the customer's quality assurance department. If necessary, relevant technicians can be invited to agree.
(2) The boundary samples shall be preserved strictly, and the samples shall not be deformed, rusted, faded or tarnished due to sunlight, humidity, man-made damage or environmental factors, so as to ensure that the features identified by the limited samples remain intact.
(3) The boundary samples shall be properly marked (labeled), including: name, serial number, recognized features, expiration date, signature and establishment date.
(4) The established boundary samples shall be labeled as limited samples, and shall be registered and listed for subsequent management.
(5) Within the validity period of the boundary samples, each place of use shall conduct inspection and quality management on the corresponding characteristics of the products according to the approved limited samples.
If a sample is not marked as a reference sample or a standard sample, it should be regarded as depending on how the contract was signed. According to the contract, the samples should be supplied according to the sample, and the samples are sealed, so the testing should meet the requirements of the samples. If there is no regulation, it shall be implemented according to the standard sample.
What is the standard sample? Simply put, the standard sample is the material standard, and the material standard is another existing form of the standard, which constitutes a complete standard form together with the literal standard.
According to GB/T 15000. 1-94 "Guidelines for the Work of Standard Samples < 1 > General Provisions on the Expression of Standard Samples in Technical Standards", "All technical indicators and related standard analysis and testing methods specified in technical standards should be developed and used accordingly when standard samples are needed, so as to ensure the application of these technical standards in different time and space. It can be seen that the standard sample is the physical standard to ensure the effective implementation of the text standard, a necessary supplement to the text standard and an inseparable part of the standard work.
However, many people are familiar with written standards but unfamiliar with standard samples, and some even don't understand them at all. What is the reason?
One of the reasons is that due to the lack of international communication and low technical level, it is not necessary to use standard samples to ensure the consistency of their application effects in different time and space, so most people do not have this requirement.
The second reason is that the standard sample was made late. It is generally believed that the standard sample was truly recognized in theory when 1975 ISO/REMCO (Standard Sample Committee) was formally established. Some people think that ISO Guideline 6, General Provisions on the Representation of Standard Samples in International Standards, should be officially published in 1978. Compared with written standards with a history of thousands of years, the development history of standard samples is too short to effectively attract the attention of experts in professional and technical fields.
The third reason is that the publicity of standard samples is not enough. In fact, the steel standard sample of standard sample nature was actually produced in the United States in 1905. After 1950, China began to develop relevant standard samples in metallurgical field. However, most people regard it as a general measuring tool and don't understand the role of standard samples in serving writing standards and effectively implementing writing standards.
The fourth reason is that the standard sample has its own characteristics, that is, it is the product of the development of standardization technology to a certain stage. That is to say, when executing the writing specification, due to technical reasons or economic benefits, standard samples must be used to achieve the purpose, otherwise the writing specification will not be confirmed.
For example, in the early metallurgical sample analysis, the general analysis method is slow and complicated, which can't guarantee the quality of iron and steel smelting and the analysis data is not reliable. After the steel standard sample is adopted, the analysis speed and quality are greatly improved, thus greatly improving the quality and economic benefits of iron and steel smelting. Therefore, the application of standard samples has developed rapidly.
Second, the definition of standard samples
The English name of standard sample is officially defined as reference substance (RM) from 1978. The original meaning is "reference object", in fact, this substance provides one or more values as reference values for the accuracy of other measured values. "That is to say, if a method is used to measure it, if the measured value is consistent with the' reference value' provided by it, then we think that the measurement method is qualified and reliable; On the contrary, if they don't match, we think the measurement method is unqualified and infeasible. Therefore, in order to be more in line with the usage habits, we call the "standard value" provided by it the sample that provides the standard value-standard sample.
In ISO Guide 30: 1992 "General terms and definitions of standard samples", standard samples are defined as materials or substances with one or more sufficiently uniform and definite characteristic values, which can be used for calibrating instruments, evaluating measurement methods and assigning values to materials. As can be seen from the definition, the standard value provided by the standard sample used as a reference has two characteristics:
1, with sufficient uniformity. Please note that it is not very uniform, but it is uniform enough. Because it is only to ensure the consistency of the application effect of technical standards in different spaces, that is, to meet the requirements of technical indicators in the preparation of standards. However, because it needs to transmit values in different spaces, that is, whether in Shanghai or Beijing, whether in China or the United States, the values provided by different standard samples in a batch of materials are consistent.
2. Very well confirmed. Please note that it does not mean very accurate, but very certain, that is, it is required that this standard value is reliable. We don't require it to be very accurate, only to meet the technical requirements in the writing standard. What needs to be emphasized here is that one of the meanings of "good certainty" is that the standard sample should have enough stability to ensure the value transfer at different times. That is, it is guaranteed to be unified and reliable within the validity period.
In the common terms and definitions of GB/t 15000.2-94 < 2 > standard samples, certified standard samples (also known as national standard samples, abbreviated as CRM in English) are defined as: "Certified standard samples have one or more chemical, physical, biological, engineering or sensory performance characteristics, and are accompanied by technical appraisal to explain the above performance characteristics.
What's the difference between standard substance, standard substance, reference substance and standard sample? The English names of reference materials and standard samples are called "reference materials" internationally, and ISO/REMCO is responsible for this work. In China, the measurement system calls "standard substance" as "standard substance", while the standardization system calls "standard sample".
Reference material refers to the reference material used for bioassay, content or titer determination of antibiotics or biopharmaceuticals, and is expressed by titer unit (U). In drug inspection, it is a reference substance to determine the authenticity of drugs and an essential tool to control the quality of drugs.
Shenma is a standard sample, referred to as standard sample or physical standard. It is developed according to the needs of implementing and formulating writing norms. As a supplement to the writing standard, the physical object is a standard material represented by the standard reference material of the Institute of Traditional Chinese Medicine.
The English name of standard sample is officially defined as reference substance (RM) from 1978. The original meaning is "reference object", in fact, this substance provides one or more values as reference values for the accuracy of other measured values. "That is to say, if a method is used to measure it, if the measured value is consistent with the' reference value' provided by it, then we think that the measurement method is qualified and reliable; On the contrary, if they don't match, we think the measurement method is unqualified and infeasible. Therefore, in order to be more in line with the usage habits, we call the "standard value" provided by it the sample that provides the standard value-standard sample.
Standard sample of cement. Yes! You can check your standard number and keywords in Gongbiao.com, where there are a lot of standard items. I heard there were ten.
Tens of thousands of standards, it is also very convenient to find standards in the standard network. I heard it's an intelligent search engine. Enter the standard number and you can easily find the relevant standards!
Go to the homepage of Baidu's "Work Standards Network" and find your own standard number or keyword, and you can find the relevant standards!
What samples did the CSOL Challenge give, and what can I do to get a disaster? There will be one thing about this disaster. Collect four or three samples to get Dr. A's suitcase. Auburn can get two kinds of samples: DNA and bone. You can get a 4A by playing the Rubik's Cube and injecting. The rest can get a 4A by playing the other four pictures. The former reaches 4A fastest. The props in fig. 4A are as follows: the life rehydration drug developed by Dr. A can greatly increase the blood volume after taking it. At the beginning of the game, the player's blood level will be automatically upgraded to a banned drug developed by Dr. Lv 15 Long Riji A, and the attack power will be improved after taking it. When the player starts the game, the attack level will be automatically upgraded to the huge sum of money used by Dr. Lv 15 in secret research. After use, players can start the game and reward $32,000. The special device developed by Dr. A in the research process will be killed by the player after use.
Baidu asked: What is a standard sample? Why is it necessary to repeatedly determine standard samples in modern instrumental analysis? A standard sample is a sample with a known component content, a known concentration and an appropriate measured concentration.
The purpose of repeated determination of standard samples: 1, which can be used to calibrate instruments; 2; Average through multiple measurements to improve accuracy; 3. It can be used to calculate the accuracy of instruments; 4. In some measurements, it is used to draw standard curves.