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Polarographic characteristics of thiosemicarbazide copper in sulfuric and hydrochloric acid solutions
ABSTRACTS described in which polarography
is utilized
593
in the known method of glycol splitting.
Rapid method for the microdetermination of acetaldehyde in vinyl chloride vapor by means of a detector tube, Y. Kobayashi, Yuki Gosei Kagaku Kyokai Shi, 16.625-29 (1958). Acetaldehyde in vinyl chloride vapor determined rapidly by means of a detector tube. Can boiled water serve as a substitute for acid to take up the ammonia in the Kjeldahl distillation? E. Schulek, V. Burger, and M. Feher, Z. anal. Chem., 167, 2% (1959). Boiled water is shown to be superior for absorption of NH, in Kjeldahl determination, as direct titration with acid is then possible. Microdetermination of carbon and hydrogen in fluoro-organic compounds, N. E. Gel’man, M. 0. Korshun, and N. S. Sheveleva, Zhur. Anal. Khim., 12, 526-33 (1957). In a method for microdetermination of C and H in fluoro-organic compounds, the F is retained by MgO which is converted MgFP. Polarographic characteristics of thiosemicarbazide copper complex in sulfuric and hydrochloric acid solutions, V. N. Podchainova and M. K. Ivantsova, Zhur. Anal. Khim., 13, 284-88 (1958). The reduction of Cu thiosemicarbazide in H2S04 and HCl is irreversible. New method for determinations of microquantities of citric acid, A. P. Safronov, Citric acid may be determined coloriZhur. Anal. Khim., 13, 360-64 (1958). metrically by conversion to pentabromoacetone and reaction of the latter with pyridine. A pink to cherry color develops. Polarographic study of P-nitrosodiwkethylanitine, V. N. Dmitriena and V. D. Bezuglyi, Zhur. Obshchei Khiwk., 28, ‘2021-28 (1958). p-Nitrosodimethylaniline forms a polarographic wave in acid solutions and a second one in basic solutions, while in acidic unbuffered solutions two waves appear.
Microfractionation
Procedures
Gas chromatography of very small quantities (microgram range), E. Cremer and R. Haupt, Angew. Chem., 70,310-11 (1958). Microgram quantities do not need to be completely separated if a proportional calibration curve is used. Gas chromatographic characterization of organic compounds, I. Retention indices of aliphatic halides, alcohols, aldehydes and ketones, E. Kovats, Helv. Chim. Acta, 41, 1915-32 (1958). The term retention index is proposed for use in the characterization of organic compounds by gas chromatography. This retention index is independent of column constants and type of apparatus and has a small linear temperature dependence.
is utilized
593
in the known method of glycol splitting.
Rapid method for the microdetermination of acetaldehyde in vinyl chloride vapor by means of a detector tube, Y. Kobayashi, Yuki Gosei Kagaku Kyokai Shi, 16.625-29 (1958). Acetaldehyde in vinyl chloride vapor determined rapidly by means of a detector tube. Can boiled water serve as a substitute for acid to take up the ammonia in the Kjeldahl distillation? E. Schulek, V. Burger, and M. Feher, Z. anal. Chem., 167, 2% (1959). Boiled water is shown to be superior for absorption of NH, in Kjeldahl determination, as direct titration with acid is then possible. Microdetermination of carbon and hydrogen in fluoro-organic compounds, N. E. Gel’man, M. 0. Korshun, and N. S. Sheveleva, Zhur. Anal. Khim., 12, 526-33 (1957). In a method for microdetermination of C and H in fluoro-organic compounds, the F is retained by MgO which is converted MgFP. Polarographic characteristics of thiosemicarbazide copper complex in sulfuric and hydrochloric acid solutions, V. N. Podchainova and M. K. Ivantsova, Zhur. Anal. Khim., 13, 284-88 (1958). The reduction of Cu thiosemicarbazide in H2S04 and HCl is irreversible. New method for determinations of microquantities of citric acid, A. P. Safronov, Citric acid may be determined coloriZhur. Anal. Khim., 13, 360-64 (1958). metrically by conversion to pentabromoacetone and reaction of the latter with pyridine. A pink to cherry color develops. Polarographic study of P-nitrosodiwkethylanitine, V. N. Dmitriena and V. D. Bezuglyi, Zhur. Obshchei Khiwk., 28, ‘2021-28 (1958). p-Nitrosodimethylaniline forms a polarographic wave in acid solutions and a second one in basic solutions, while in acidic unbuffered solutions two waves appear.
Microfractionation
Procedures
Gas chromatography of very small quantities (microgram range), E. Cremer and R. Haupt, Angew. Chem., 70,310-11 (1958). Microgram quantities do not need to be completely separated if a proportional calibration curve is used. Gas chromatographic characterization of organic compounds, I. Retention indices of aliphatic halides, alcohols, aldehydes and ketones, E. Kovats, Helv. Chim. Acta, 41, 1915-32 (1958). The term retention index is proposed for use in the characterization of organic compounds by gas chromatography. This retention index is independent of column constants and type of apparatus and has a small linear temperature dependence.