FIELD: chemistry.
SUBSTANCE: claimed is reagent indicator truncated cone, which contains flow hollow profile, inside which sorbent with immobilised on it chromogenic reagents, is placed, with smaller base being input hole of truncated cone, overall dimensions of which are selected by the following dependences: ds = 0.25÷2.5, dl = (4÷50)·ds, ht.c = (8÷100)·ds, where ds and dl are diameters of smaller and larger bases of truncated cone, mm; ht.c is height of truncated cone, mm.
EFFECT: expressivity and increase of sensitivity of ion identification.
2 dwg, 8 ex
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