Chromatographic adsorption analysis
01 Mar 1942-Industrial & Engineering Chemistry Analytical Edition (American Chemical Society)-Vol. 14, Iss: 3, pp 245-249
About: This article is published in Industrial & Engineering Chemistry Analytical Edition.The article was published on 1942-03-01 and is currently open access. It has received 84 citations till now. The article focuses on the topics: Expanded bed adsorption & Adsorption.
Citations
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TL;DR: In this article, a new Methode is proposed, which auf adsorptiver Filtration an hochaktivem Aluminiumoxyd beruht und sich schnell und bequem anwenden last.
Abstract: Fur die Herstellung stabilisatorfreien Chloroforms wird eine neue Methode beschrieben, die auf adsorptiver Filtration an hochaktivem Aluminiumoxyd beruht und sich schnell und bequem anwenden last. Das Verfahren soll aber stets erst unmittelbar vor der Verwendung des Chloroforms angewandt werden.
42 citations
TL;DR: Eine einfache und zeitsparende Methode zum Wasserfreimachen organischer Losungsmittel durch Filtration uber Aluminiumoxyd der Aktivitat I wird beschrieben as discussed by the authors.
Abstract: Eine einfache und zeitsparende Methode zum Wasserfreimachen organischer Losungsmittel durch Filtration uber Aluminiumoxyd der Aktivitat I wird beschrieben. Die verbleibenden minimalen Restmengen Wasser werden angegeben.
39 citations
TL;DR: In this paper, the relation between the rate of photosynthesis and the pigment content was studied in seedlings of Avena sativa var. Victory and it was shown that the saturation rate increased with increasing pigment concentrations until the ratio chlorophyll b /chlorophyll a approached its normal value.
35 citations
TL;DR: In this paper, a papierchromatographische Methode gestattet es, unter besonderen Vorsichtsmasregeln (Vakuum) die Blattpigmente nicht nur genauer in einzelne Farbstoff-Kompoenenten aufzuteilen, sondern sie auch in einem Analysengang in solchen Mengen zu gewinnen, das sie spektroskopisch identifiziert and quantitativ er
Abstract: I.
Die Chloroplasten-Farbstoffe lassen sich zur quantitativen Bestimmung aus einem Aceton-Extrakt mit 10% iger NaCl-Losung verlustlos in Berzin uberfuhren und dann and einer praparierten Starkesaule in die 6 Hauptfarbstoffe Neoxanthin, Chlorophyll b, Chlorophyll a, Violaxanthin, Lutein und Carotin aufteilen. Die Trennung wird durch ein Losungsmittel-Gemische aus 5 Komponenten erreicht (in Volumeneinheiten: Benzin 60, Benzol 35, Chloroform 1,25, Aceton 0,55, Isopropanol 0,06).
II.
Eine neue papierchromatographische Methode gestattet es, unter besonderen Vorsichtsmasregeln (Vakuum) die Blattpigmente nicht nur genauer in einzelne Farbstoff-Kompoenenten aufzuteilen, sondern sie auch in einem Analysengang in solchen Mengen zu gewinnen, das sie spektroskopisch identifiziert und quantitativ erfast werden konnen. Mit dieser Methode wurden in hoheren Pflanzen folgende Pigmente gefunden:
33 citations
TL;DR: The International Chemical Union chromatographic procedure has been successfully applied to a variety of crude cottonseed and soybean oils and to a few vegetable oil residues containing high percentages of loss constituents as discussed by the authors.
Abstract: Various methods for estimating the neutral oil content, or conversely the loss constituents of crude cottonseed oil and soybean oil, have been explored. Of those techniques studied the International Chemical Union chromatographic procedure seemed most appropriate because it was found to be reasonably accurate and most reproducible, was easy and rapid to carry out, and required no special, elaborate, or expensive equipment. The chromatographic method has been successfully applied to a variety of crude cottonseed and soybean oils and to a few vegetable oil residues containing high percentages of loss constituents. The results obtained with this technique would appear to be eminently suitable for evaluating the efficiency of plant refining processes.
33 citations
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248 citations
TL;DR: The α-tocopherol as mentioned in this paper is a possibly the allophante of β-amyrin, which was derived from wheat germ oil thress aflophanates.
170 citations
TL;DR: A provisional formula for α-tocopherol is proposed, which when given in a single dose of 3 mg.
Abstract: We have prepared from the non-saponifiable matter of wheat germ oil thress aflophanates:
1. M.p. 250°. This is a possibly the allophante of β-amyrin. The alcohol regenrated from the allopohante has no vitamin E potency.
2. M.p. 138°, readily crystallizing in long needles. The analysis agree with values required by monollophantes of an alcohol, C39H50O2. The alcohol from this allophante apparenelly has some vitamin E potency, but less than that from the third allophanate.
3. M.p. 158-160°. From this allophanate, the alcohol—for which we propose the name α-tocopherol—when given in a single dose of 3 mg. always enables vitamin E-deficient rats to bear young. α-Tocopherol shows a characteristic absoption band at 2980 A., E1 per cent1 cm. = 90 ca. Treatment with methyl alcoholic silver nitrate converts it to a substance which has absorption bands at 2710 and 2620 A respectively, E1 per centcm. = 480 ca., and possesses and some vitamin E activity.
α-Tocopherol yields a crystaline p-nitrophenylurethane melting at 120-131°. Analyses of both the urethane and the allophanate indicate a provisional formula for α-tocopherol of C29H50O2
155 citations
01 Jan 1938
113 citations
95 citations