Explanation of standard sample: Standard sample is referred to as standard sample or physical standard. It is developed based on the needs of implementing and formulating written standards. The physical object used as a supplement to the written standards is a standard material represented by the Institute of Standard Reference Materials of Traditional Chinese Medicine.

Reference samples: In international trade, the seller provides samples to the buyer only as a reference for negotiation. They are called reference samples. They are different in nature from the transaction samples and should not be used as a formal basis for inspection.

Difference:

The standard sample has two characteristics:

1. It has sufficient uniformity. Note not perfectly uniform but even enough. Because it is only to ensure the consistency of the application effects of technical standards in different spaces, that is, it only needs to meet the requirements of the technical indicators in the text standards.

2. Very certain. Please note that it does not mean very accurate but means very certain, that is, the standard value is required to be reliable. It is not required to be very accurate; it is only required to meet the technical index requirements in the text standard.

Reference samples: refers to goods that buyers and sellers send to each other in order to develop their trade relations. They are only for the other party to understand and are not used as a quality basis for transaction or delivery. Reference samples must be marked "For Reference Only" when sent to avoid confusion with standard samples. Such samples are not binding on either party.

Standard sample

Pinyin: biāo zhǔn yàng pǐn

Sentence:

Determination of polystyrene standard sample by small-angle laser light scattering method Weight average molecular weight.

A library of standard samples of special animal fibers and chemical fibers is provided to facilitate comparison during experiments.

Awcc uranium standard sample is mainly used to determine the uranium content in uranium-aluminum alloy chips and uranium slag.

Through the analysis and testing of environmental standard samples, the impact of these five factors on the permanganate index was examined.

Determine the average molecular weight and molecular weight distribution of polystyrene standard samples by size exclusion chromatography.

Reference samples

Pinyin: cān kǎo yàng pǐn

Sentence:

Reference samples are effectively kept in the workplace to avoid doing Damaged

Each reference sample has a sample label or is signed by the approver/approvor on the sample

The reference sample has not been approved, or has been approved but is not responsible for it The person signed the approval, or the reference sample was not clearly marked

It provides a basis for the production of optimized reference samples for the improved microwave non-destructive testing instrument cpy-ig, which increases the detection accuracy of cpy-ig to 95% .

3. Use genetic algorithms to optimize and analyze various parameters of the anechoic tile reference samples, select appropriate reference samples, and use analytical methods to check the validity of the genetic algorithm optimization results.