METHOD OF SPECTROPHOTOMETRIC IDENTIFICATION OF METAL IONS Russian patent published in 2014 - IPC G01N33/52 G01N21/25 G01N21/33 

FIELD: chemistry.

SUBSTANCE: invention relates to monitoring of the environment and biological objects aimed at identification of the content of metal ions in liquid media with the application of photochromic compounds. In the method of spectrophotometric identification of metal ions in liquid media with an application of photochromic compounds of class of chromenes due to formation of complexes between the photoinduced merocyanine form of the said compounds and metal ions as chromenes used are such bischromenes as: 2,2,11,11-tetrakis(4-methoxyphenylphenyl)dioxa(1,12)triphenylene, 2,2,8,8-tetrakis(4-methoxyphenyl)dioxa(1,7)chrysene, 3,3,11,11-tetra-(4-methoxyphenyl)-3,11-dihydro-4,10-dioxadibenzo[a,h]anthracene, 3,3,10,10-tetra-(4-methoxyphenyl)-3,10-dihydro-411-dioxadibenzo[a,h]anthracene.

EFFECT: increased selectivity of identification is achieved.

24 ex, 1 tbl, 6 dwg