After each experiment, all participants in the experimental research should sign the original records by the experimenter and the person in charge of the experiment. Many places in the original records involve signatures, so we should correctly understand the seriousness of signatures. All signatures must be completed by myself and cannot be signed on behalf of others.

2. Modification of original records

The original records shall not be deleted, modified or increased or decreased at will. If revision is needed, a diagonal line should be drawn at the revision place, and it cannot be completely blacked out, so as to ensure that the records before revision can be identified and signed by the reviser, indicating the revision time and reason.

3. Traceability of standard solution

Commonly used standard solutions include titration solution, standard pH buffer solution, standard colorimetric solution, standard lead solution and standard arsenic solution. When using these standard solutions, the process of preparation and calibration should be recorded in the original records, or the source should be indicated, and the preparation and calibration records should be recorded in another record book.

4, use and recipients registration

During the experiment, we should register the use of the instrument, and the original records should correspond to the use registration. The collection and registration of some special reagents (poison, hemp, essence and release) should correspond to the original experimental records, and the collection records of reference substances and reference medicinal materials should correspond to the original experimental records.

5. Pictures and photos in the experiment

The pictures and photos in the experiment should be pasted in the corresponding positions of the original records of the experiment, and the negative or electronic version should be properly kept. A record of the experiment printed on thermal paper should be kept. When taking pictures, you should mark them and record the atlas. When taking a photo, you can put a small note beside it and take a picture of the corresponding name and brief information together.

6. Writing of original records

The original records should be written neatly and the words should be standardized. Pencils and ballpoint pens shall not be used for all records (except microscopic drawing). Commonly used foreign language abbreviations (including foreign language abbreviations of experimental reagents) shall comply with the provisions. When it first appears, it should be annotated in Chinese. There should be no uncertainty in the experimental records (such as 1 ~ 2 drops, 5 ~ 10UL). Experimental records should use standardized technical terms, and indicate the unit of measurement, using international standard recording units. The selection of effective graphics should meet the experimental requirements. Selection of effective digits: revision principle: select effective digits appropriately: the number of effective digits is determined according to the numerical value, such as integer digits when the peak area of liquid chromatography is tens of thousands or hundreds of thousands; When expressing measurement accuracy, the standard deviation only takes two significant figures at most.

7. According to the requirements of sample quantity

When determining the content, the reference substance should be weighed according to the requirements of weighing accuracy. When weighing the reference substance, a hundred thousand balances should be used, and the weighing amount should be not less than 10mg. Don't weigh with a scale of 1/10000, and some even have only 1 and 2mg, so the weighing error will be great.

8. Originality of original records

The original records shall be recorded during the experiment, and shall not be supplemented or copied afterwards. The original records should not only record the test results, but also record the test process.

9, high performance liquid chromatography printing

High performance liquid chromatography (HPLC) is a kind of atlas that software collects the electrical signals given by instruments through computers, converts them into digital signals, and prints them after analysis and processing. With the function of acquisition and processing software becoming more and more powerful, the system will record a lot of information every time it is injected. Generally, only some information we need is selected for printing, but these information do not have to be reflected. The experimental information includes: collection time, storage path, printing time, experimental method name, operator name, sample size, etc.

10, experimental items and conclusions

What is the purpose of this experiment? It should be recorded before each experimental project starts. After the experiment, we should also analyze the results and draw a clear conclusion.

1 1, parallel experiment

Under the test items, such as pH determination, moisture content, relative density, ash, etc. , two copies of content determination should be carried out in parallel. When the content is determined by HPLC or GC, each sample should be injected twice. The answer comes from