Improved Steam-Distillation Apparatus

Griffith, R. B.; Jeffrey, R. N.

doi:10.1021/ac60016a009

Cited by 16 publications

(3 citation statements)

References 7 publications

(1 reference statement)

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“…A portion of the acetone solution was used for paper chromatographic estimation of the kinds and relative amounts of alkaloids present (4) and another portion was analyzed for total alkaloid by pipetting 10 ml. of it into a steam still (1), adding 1 ml. of 1 + 4 HC1, distilling until the acetone was removed, adding 4 ml.…”

Section: Methodsmentioning

confidence: 99%

Alkaloid composition of nicotiana rustica strains /

Jeffrey¹

1957

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The seedings of the various strains were produced under the supervision of Dr. J. E. McMurtrey, Jr., to whom thanks is also due for supplying the information given in Table 1 on the identification and past history of the strains. The analyses of the green plants were conducted by Mr. G. E. LaRoche, and of the cured plants by Mrs. Tamara Sorokin. ii ALKALOID COMPOSITION OF NICOTIANA RUSTICA STRAINS R. N. Jeffrey 1N icotine is generally considered to be the typical alkaloid of the genus Nicotiana, though it is well known (5)-^that different species contain different alkaloids. Studies conducted in this (6) and other (2., 7 , 8) laboratories since more sensitive means of differentiation of alkaloids have become available , have shown that in N. tabacum strains exist which differ in the proportion of nornicotine to nicotine in the green or in the cured leaf. We are not aware of any published report of a similar situation in N. rustiea , so when samples of a considerable number of strains of J$j rustica became available in connection with other work of the Tobacco Section, they were analyzed,, both in the green state and after curing, to determine whether strains which differed significantly in alkaloid composition either before or after curing were present in this collection. Certain information concerning the strains grown is given in Table 1. This includes the source of the seed used and some information as to the previous history of the strain. In most instances additional information is available if needed by an investigator, but nearly all samples lead back to some point where the record is incomplete.

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Section: Methodsmentioning

confidence: 99%

Alkaloid composition of nicotiana rustica strains /

Jeffrey¹

1957

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“…The aqueous solution of the nicotine from each of these materials was prepared by steam distillation from solutions made strongly alkaline with either barium or sodium hydroxide. The still used was a modification of that of Griffith and Jeffrey (6). A test for completeness of distillation of the nicotine by a qualitative silicotungstic turbidimetric method indicated apparent complete recovery after 4 to 6 minutes, whereas the spectrophotometrie method showed an actual recovery of only 95 to 96%.…”

Section: Application Of Methodsmentioning

confidence: 99%

Spectrophotometric Determination of Nicotine

Willits¹,

Swain²,

Connelly³

et al. 1950

Anal. Chem.

114

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“…The monia in phenol-formaldehyde molded materials to white linseed oil paints. A few other typical publications on specific analyses are cited (2,5,31,43,51,60,65,75,86,92,127,140,148,150).…”

Section: Simple Distillation Proceduresmentioning

confidence: 99%

Distillation

Rose¹

1949

Anal. Chem.

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Improved Steam-Distillation Apparatus

Cited by 16 publications

References 7 publications

Alkaloid composition of nicotiana rustica strains /

Alkaloid composition of nicotiana rustica strains /

Spectrophotometric Determination of Nicotine

Distillation

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