Laboratory samples are materials used in laboratory experiments. The amount is relatively small, and they are stored in specified containers and conditions. There is a strict management system for access and storage. Laboratory sample management is a necessary link and key control point in the entire process of laboratory accreditation, measurement certification, review and accreditation, etc. This article explains from the following two aspects:

1. Sample management system

2. Sample management process

Sample Preparation System

1. Purpose

The representativeness, validity and integrity of the samples will directly affect the accuracy of the test results, so it is necessary to implement effective measures for sampling, storage (4°C refrigerator) (-20°C refrigerator), identification, and sample disposal. control to ensure that the test results are accurate and reliable. And do a good job in the confidentiality and security of samples.

2. area

This procedure is applicable to the management of sampling, circulation, storage, disposal, identification, etc. of samples.

3. Responsibilities

① The quality inspection center is responsible for the management of samples in the analysis and testing laboratory.

②Laboratory sample technical management personnel are responsible for sampling at the designated place on time according to the sample sampling procedure, and record the status of the sample when the sample is received, and do a good job in the identification of the sample and the quality control of the sample storage, circulation, and disposal process.

③ After receiving the samples, the laboratory testing personnel should protect the samples during the preparation, testing and delivery process.

④ Laboratory sample technical management personnel are responsible for supervising and inspecting the sample management in the testing room, and the quality control supervisor is responsible for sample management.

4. Sampling of samples

① Sampling personnel should go to the designated place to take samples on time according to the sampling frequency. The sampling person should be responsible for the protection of the samples during transportation to ensure the integrity of the samples.

② When there is an emergency and sampling analysis is required at another time, the relevant sample management personnel shall conduct acceptance registration.

③ The laboratory sample management personnel should record the status of the sample when receiving the sample, and record it in the account.

④ When analysts have doubts about whether the samples are suitable for testing, or quality control personnel are skeptical about the test results, or think that the samples do not meet the requirements of relevant regulations, or there are abnormalities (including packaging and sealing), re-sampling must be carried out analyze.

5. Identification of samples

① The identification of samples includes the distinction and identification of different samples and the identification of samples under different test conditions.

②Sample distinguishing mark, affixed on the outer packaging of the sample, the content of the mark includes the inspection sample number, analysis items, and indicating the sampling time and date.

③ When the samples are in different test states, or in the stages of sample receiving, circulation, storage and disposal, etc., the transfer of labels should be done according to the different characteristics and requirements of the samples, so as to maintain a clear sample identification number and ensure that the samples in each analysis room The uniqueness of the numbering method ensures traceability of sample analysis results.

④The laboratory should, according to the professional requirements, make clear regulations on the transfer method of sample identification and how to ensure the uniqueness and validity of sample identification in the relevant work instructions.

6. Storage of samples

① The quality inspection center should have a special and suitable sample storage place, equipped with sample rooms and sample cabinets (racks). The sample room is in charge of a special person, and access is restricted. Samples should be classified and stored, clearly marked, and accounted for consistently. The sample storage environment should be safe, non-corrosive, clean, dry and well ventilated.

② For samples that are required to be stored under specific environmental conditions, the environmental conditions should be strictly controlled, and the environmental conditions should be recorded regularly.

Sample Management Process

1. Receipt of samples

The receipt of samples is the first and most important step in the whole sample testing work. The receipt of samples must be done by a dedicated sample receiver. When receiving samples, the sample receiver needs to check the basic data of the sample with the sample sender, and then record the data of the sample in detail to ensure the originality of the sample. At the same time, a preliminary observation is made on the sample to confirm whether it can be tested. Finally, fill in the sample receipt in detail.

2. Identification of samples

After the sample is received, it is necessary to place the sample in the area to be inspected first, and then mark the sample. The label of the sample should be placed in an obvious and eye-catching place that does not hinder the inspection. The basic content of the sample label includes the name, number, specification and status of the sample, etc. The text on the sample label must be clearly visible, simple and clear, and the sample will never be confused due to unclear labels. The sample identification is the only label that can identify the sample and needs to exist in the entire process of sample circulation.

3. Confirmation of samples

After the sample manager identifies and records the basic performance of the sample, the inspector shall confirm the sample. Inspectors need to obtain samples from the sample warehouse with valid certificates, and carefully fill in the sample circulation certificate. When the inspector receives the sample, he needs to confirm the basic situation of the sample immediately, including the status of the sample itself, whether it conforms to the corresponding detection method, and whether it conforms to the basic description of the submitting party. If it is found that the state of the sample itself is abnormal, or the description of the sample is different from that of the inspector, or the description of the corresponding test content is not comprehensive, etc., the inspector needs to record all the problems that occur, communicate with the inspector, and wait for the doubts to be eliminated. , to start the test.

4. Circulation of samples

When a sample is circulated, the identification on the sample will be the only basis for identifying the sample. In each step of the sample inspection, the identification on the sample must not be destroyed, and the identification on the sample cannot be arbitrarily changed or delineated under any circumstances, and the original number of the sample is always recorded in the inspection record. When samples are processed, handled, tested and circulated, it is necessary to effectively protect the samples and keep them away from harmful sources. When the test is completed, the inspectors should immediately clean the samples and send them to the sample storage warehouse, where specialized personnel will check and register the samples.

5. Storage of samples

Laboratories need to set up specific places suitable for sample storage. For different types of test samples, they should be classified and placed, clearly marked, and the records should be consistent with the actual objects. The storage environment of samples needs to ensure the safety of samples, no pollution, no corrosion, dry and ventilated. For specific samples, they need to be stored in special environments and conditions, and the environmental index needs to be strictly controlled and detailed records should be made. When the testing personnel store the samples, they ensure the safety and integrity of the samples. Dangerous goods such as flammable, explosive and toxic need to be stored in a specific way, away from other samples, and marked with eye-catching marks.

6. Processing of samples

After the samples are tested, they need to be classified, and appropriate treatment should be carried out with reference to the respective specifications, procedures and treatment opinions of different samples. If the test customer needs to retrieve the sample, it must also strictly follow the regulations in the sample handling specification to retrieve the sample. If the sample is stored for a certain period of time and then retrieved by the client, the sample can only be retrieved after application, review and approval . If the sample has passed the storage period, it is necessary for the laboratory and the submitting unit to communicate and process the sample together. When the sample is processed, the administrator should make a record.

7. Sample safety

Every step of sample management, especially the testing, storage and processing of samples, needs to abide by a strict confidentiality system to strengthen the confidentiality of relevant information about samples. Stored samples cannot be used at will without special instructions. For samples with special instructions, relevant requirements must be met to ensure compliance. At the same time, in the steps of sample receiving, circulation, storage, processing, and information management, corresponding protective measures need to be taken to ensure that samples are not damaged and confidential information is not leaked.

The following points should be paid attention to in the management of samples in testing laboratories:

①Sample management should be institutionalized and standardized;

② Sample management should establish a unique identification;

③ Strictly review the status of samples;

④ Do a good job in sample storage and cleaning;

a. Sample storage is the key content of sample management.

b. A sample storage room in line with product characteristics should be built.

c. Strictly control the entry and exit of samples.

d. Strictly implement the sample destruction work.

⑤Strengthen the internal audit work of the laboratory:

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