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S Chapman

Publications and source records attributed to S Chapman.

444 records · Page 25Linked to original sources
PubMedDate not supplied

Gas chromatographic determination of volatile congeners in spirit drinks: interlaboratory study.

An interlaboratory study of a gas chromatographic (GC) method for the determination of volatile congeners in spirit drinks was conducted; 31 laboratories from 8 countries took part in the study. The method uses GC with flame ionization detection and incorporates several quality control measures which permit the choice of chromatographic system and conditions to be selected by the user. Spirit drink samples were prepared and sent to participants as 10 blind duplicate or split-level test materials for the determination of 1,1-diethoxyethane (acetal), 2-methylbutan-1-ol (active amyl alcohol), 3-methylbutan-1-ol (isoamyl alcohol), methanol (methyl alcohol), ethyl ethanoate (ethyl acetate), butan-1-ol (n-butanol), butan-2-ol (sec-butanol), 2-methylpropan-1-ol (isobutyl alcohol), propan-1-ol (n-propanol), and ethanal (acetaldehyde). The precision of the method for 9 of the 10 analytes was well within the range predicted by the Horwitz equation. The precision of the most volatile analyte, ethanal, was just above statistically predicted levels. This method is recommended for official regulatory purposes.

1-Propanol↗
PubMedDate not supplied

Cannon balls.

Radiological terminology includes a number of interesting and often amusing terms intended to help us understand and remember the pathological abnormality being described. What radiological sign is illustrated in Fig. 1 and what is the differential diagnosis?

Diagnosis, Differential↗
PubMedDate not supplied

Onion skin.

Radiological terminology includes a number of interesting and often amusing terms intended to help us understand and remember the pathological abnormality being described. What radiological sign is illustrated in Fig. 1 and in what condition is it most frequently observed?

Bone Neoplasms↗
PubMedDate not supplied

The coiled spring.

Radiological terminology includes a number of interesting and often amusing terms intended to help us understand and remember the pathological abnormality being described. What radiological sign is illustrated in Fig. 1 and what condition does it represent?

Humans↗
PubMedDate not supplied

Lemons and bananas.

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Cephalometry↗
PubMedDate not supplied

Boot-shaped heart.

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Heart↗