The determination of residual solvents in pharmaceutical packaging materials method of standard curve method
Take five different concentrations of organic solvent comparison under test ( Linear range according to the actual sample under test of organic solvent content determine) 。 At 100 ℃ & plusmn; 2 ℃ constant temperature box maintain 60 minutes ( When necessary, according to material and solvent, under test is placed within the range 80 ~ 150 ℃ for 15 minutes and 60 minutes, decomposition temperature is higher than the solvent boiling point below materials as appropriate) With preheating temperature to the same container the top 1 ml syringe extraction of gas into the gas chromatograph. Measurement of peak area ( Or peak) , draw peak area ( Peak) The standard curve with the corresponding organic solvent quality. Take the sample, according to the standard curve method 'at 100 ℃ & plusmn; 2 ℃ constant temperature box keep 60 minutes' operation. According to the sample under test in the organic solvent peak area ( Peak) , from the standard curve of the quality of the samples contained in the solvent, press type calculation. X = m/W type: X-ray - - Samples of solvent residue, mg/m2; m - - - To test the quality of the solvent, mg; W - - - Sample surface area/m2.
The rise of the beauty economy has caused cosmetic brands to pay more and more attention to appearance packaging.
●Design team: cosmetics packaging design
●Project background: With the improvement of living standards, cosmetics, a fashionable consumer product, has gradually become the mainstream product in people's lives.
It is the nature of every woman to love beauty.
The cosmetics market has gradually improved in recent years
Now cosmetics are no longer exclusively for women
Cosmetic packaging is also gradually out of a more diversified style
Want to know the latest cosmetic packaging design trends?
You'll understand after reading this article!
The most potential petty bourgeoisie brand-simple style makes me feel relaxed and happy!
Cosmetic packaging is a subdivision field that has grown rapidly in recent yea
Cosmetics are commodities that every woman uses.
Simplified packaging design style is a design direction recognized by young people and modern culture.
Consumer trends are the driving force of packaging innovation, and big data analysis is to combine trend insights with packaging innovation.
In order to attract consumers, in recent years, businesses have put more and more effort on cosmetic packaging, and various novel and exquisite packaging have emerged one after another.
In addition to the production date, manufacturer, etc., what are the secrets of the neglected graphic symbols, words, and numbers on the outer packaging of cosmetics?
In addition to the most common barcodes, there are some unobtrusive small icons on cosmetic packaging that also represent very important information.
This common small open can logo means the shelf life after opening.