Reference

Comparison of influence of 3 heavy solutions on the isolation of charred plant residues in volcanic ash soils

Comparison of influence of 3 heavy solutions on the isolation of charred plant residues in volcanic ash soils. Honma, Hiromi; Shindo, Haruo (Sci. Invest. Res. Lab., Yamaguchi Prefect. Police H. Q., Yamaguchi 753, Japan). Nippon Dojo Hiryogaku Zasshi, 67(6), 686-691 (Japanese) 1996 Nippon Dojo Hiryo Gakkai. CODEN: NIDHAX. ISSN: 0029-0610. DOCUMENT TYPE: Journal CA Section: 19 (Fertilizers, Soils, and Plant Nutrition) Three heavy solns., i.e. Na polytungstate soln., Thoulet (HgI2-KI) soln., and ZnCl2 soln., were compared for the isolation of charred plant residue (CPR) in volcanic ash soils. The 3 solns. isolated CPR in the fraction of sp. gr. ￡1.6 and the amt. of org. C was 310% of the total org. C of the sample. The distribution ratios of the org. C in the fraction of sp. gr. ￡1.6 were almost the same in the 3 solns. Consideration of the environmental effect of Hg compds. and high viscosity of the ZnCl2 soln. recommended the Na polytungstate soln. as the heavy solns. for the isolation of CPR.Except for chemicals metioned above, 7783-33-7 and 12141-67-2 are also used. .

Interaction of aliphatic polyamines with Nessler reagent

All Rights Reserved. Interaction of aliphatic polyamines with Nessler reagent. Demuthkaya, L. N.; Kalinichenko, I. 107-15-3 and 7783-33-7 are cas registry numbers. These chemicals are also mentioned in this article. E. (Institute of Colloid and Water Chemistry, National Academy of Sciences of Ukraine, Kiev 03680, Ukraine). Journal of Analytical Chemistry, 61(11), 1063-1066 (English) 2006 Pleiades Publishing, Inc. CODEN: JACTE2. ISSN: 1061-9348. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) Section cross-reference(s): 61 Products of the interaction of Nessler reagent with ethylenediamine and other aliph. polyamines are insol. complexes of different compn. and sol. colored complexes. The latter are formed only in the presence of ammonia and can be used for the detn. of polyamines in water with a detection limit of ~1 ′ 10-6 M. .