Since the developed standard substances are continuously tested at low temperature, the purging gas is always on. In order to ensure the continuous supply of purging gas, a small gas drying device is established for continuous operation of the instrument at low temperature. According to the principle of thermal analysis of the standard material uniformity test, 15 samples were randomly selected from each of the 500 samples prepared, and each bottle was measured 3 times. The uniformity test of gallium metal and phenyl salicylate standard material was qualified. The following is a small edition of Bolinda to introduce you to the procedures for the use of thermal analysis standard substances.

Procedures for the use of thermal analysis standard substances:

1, if there is no special circumstances, the content of the working standard product is re-marked once every six months or another newly produced sample is calibrated. When the standard product is not used temporarily, the re-marking cycle may exceed the specified period, and the re-marking is carried out before use, and it can continue to be used after passing.

2, for the work standards used in a specific market, it can be carried out in accordance with the cycle stipulated by the local pharmaceutical bureau or pharmacopoeia.

3, if the standard product is found abnormal or large changes during use, the use of the standard product should be stopped, and consider adopting more stringent packaging and storage methods or shortening its re-standard period and other measures.

4. If the old benchmark standard batch number expires, the corresponding working standard calibrated with this batch benchmark standard shall be re-calibrated according to the new batch benchmark standard, and the reserve solution prepared with this batch standard shall also fail at the same time, and the new batch benchmark standard shall be re-prepared.

5, thermal analysis of standard substances according to the requirements of the manual, if the label or the test list does not indicate the expiry date (expiry period), you can go to the website, such as USP, EP standard catalogue, if you can not find, with the factory provisions of the expiry date of such drugs, if you can not know the date of this batch of calibration, you can count from the date of receipt of standard products.

6. For the work standard products calibrated by the provincial drug inspection and Veterinary drug inspection, the validity period (expiration period) is the same as the validity period of the product.

The above content is the introduction of the procedures for the use of thermal analysis standard substances, the new bottle of standard products to indicate the opening date on the bottle, should be used according to the bottle number in turn (except for the use of the whole bottle or the sample), the same batch of standard products or working reference products must be used after one bottle and then open another bottle, the standard product use process, It is strictly forbidden to put the removed standard back into the original bottle.