Réponse à question 2 posée dans le No. 5 du Vol. 4 (1950) 560 par The British Drug Houses Limited
✍ Scribed by M. Borrel; R. Pâris
- Publisher
- Elsevier Science
- Year
- 1951
- Tongue
- English
- Weight
- 88 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
QUAESTIONES IN FOR0
MY 7 uestion hand es relates to the problem of the teacher of organic chemistry, who the course work in micro organic analysis but who is not a specialist in that kind of analysis (a common situation in many colleges). I would like to have a list of organic compounds which according to the experience of competent analysts give a minimum of troubles in PREGL carbon-hydrogen analysis, DUMAS nitrogen, Micro KJELDAHL, and also the micro halogen and sulfur analyses using the PARR or similar bomb with sodium peroxide according to the method of ELEK or others, Using such compounds, the instructor could expect sludent analysts to report reasonably good results, or, if the results are bad he will know the difficulty lies with the student and not the compound.
If one had IO to 15 compounds suitable for each of the analyses listed, and such compounds were either readely prepared in a high state of purity, or available as analytical reagents, the instructional problem would be greatly simplified. I might add that it is altogether too tempting to take some beautiful crystalline compound whose melting point is just what the literature reports, and expect a student analyst to report a correct analysis. Too often some unforeseen difficulty arises and a series of bad results is the only reward for a day's work..