There are many varieties of reference products, and there are certain requirements for its preservation methods, generally speaking, the reference products should be placed in a dry and cool place, we all know that the reference products are frequent laboratory visitors, so if improperly preserved, it will directly affect its experimental accuracy, but for different reference products, the preservation method is also different, it is recommended to use the reference products as soon as possible after opening the bottle. Avoid decomposition, contamination or moisture absorption of the control product. So what are the points of detail that need to be paid attention to when comparing the calibration method? The following is a small edition of Bolinda to introduce you.

Points of detail to pay attention to when calibration method:

1, the amount of reference should meet the requirements of titration accuracy (consumption of titration liquid about 20ml).

2, the determination of titration end point should be clear, and the titration curve should be provided; If the indicator method is selected, the sensitivity of color change should be considered, and the end color should be calibrated by potentiometric method.

3. In order to exclude the influence of impurities mixed with other reagents on the determination results, or to facilitate the calculation of residual titration, the method of "correcting the titration results with blank test" can be used.

4, to give the titration degree (using four significant digits) derivation process; The calibration results shall be based on the results of no less than 15 groups of determination results from more than 3 laboratories, after statistical analysis, the results of removing outliers and suspicious values, and the reliability limit shall be reported.

The above content is the introduction of the details that need to be paid attention to when the calibration method of reference products, at present, many companies are actually not very in place for the management of reference products, especially those companies that are not very familiar with the reference products themselves, often prepare the reference products into a higher concentration of reserve liquid, but fail to examine its stability and storage period. Some will be opened and opened before the control products together, there is no special instructions on the package. This also makes some controls lose their original experimental accuracy.