Don't buy chemical reagents. Don't be blind. These basics are clear
Maybe we've been exposed to a lot of chemical reagents, and we know a lot about some of his properties, but do you really understand the content and purity of chemical reagents, and do you know the difference between purity and content?
First let's talk about the difference between purity and content in biochemical reagents (listed as anhydrous ethanol).
Regarding purity:
Chestnut for example: take the 100ML reagent alcohol in the experimental utensils to volatilize normally containing a total of 0.01 impurities the remaining 99.99% is the purity of alcohol. Its purity is the sum of volatile compounds such as alcohol and water. Impurities are non-volatile particles.
With regard to content:
The content is the content of the main alcohol. The analysis is pure national standard 99.7. Electronic pure for the standard 99. 9. All reagents are required to be labeled as content data by the State Administration of Technical Supervision. The industrial grade does not have this literature request for the time being.
At present, there is a high purity industrial alcohol labeled 99.99. one is that the country has no specific standards and requirements for it, the other is the purity of alcohol.
The raw material of reagent alcohol is high purity industrial alcohol. Industrial-grade alcohol in the sales process there are only simple packaging and packaging, not to speak of any testing. Therefore, in theory, in the course of packing, it will be contaminated by the packing at least once or more than once and the inner wall of the packaging drum in varying degrees. The reagents have higher alcohol content, higher purity, purer quality and longer shelf life than industrial grade alcohol.
The above explanation is suitable for all reagent items
First let's talk about the difference between purity and content in biochemical reagents (listed as anhydrous ethanol).
Regarding purity:
Chestnut for example: take the 100ML reagent alcohol in the experimental utensils to volatilize normally containing a total of 0.01 impurities the remaining 99.99% is the purity of alcohol. Its purity is the sum of volatile compounds such as alcohol and water. Impurities are non-volatile particles.
With regard to content:
The content is the content of the main alcohol. The analysis is pure national standard 99.7. Electronic pure for the standard 99. 9. All reagents are required to be labeled as content data by the State Administration of Technical Supervision. The industrial grade does not have this literature request for the time being.
At present, there is a high purity industrial alcohol labeled 99.99. one is that the country has no specific standards and requirements for it, the other is the purity of alcohol.
The raw material of reagent alcohol is high purity industrial alcohol. Industrial-grade alcohol in the sales process there are only simple packaging and packaging, not to speak of any testing. Therefore, in theory, in the course of packing, it will be contaminated by the packing at least once or more than once and the inner wall of the packaging drum in varying degrees. The reagents have higher alcohol content, higher purity, purer quality and longer shelf life than industrial grade alcohol.
The above explanation is suitable for all reagent items
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