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2004•Journal of Zhejiang Normal UniversityRequires access

Spectrophotometric determination of NO_2~- with 4-(2-thiazolylazo)-resorcinol system

WU Lan-ju

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Abstract

This paper studied the ion association system of protonated 4-(2-thiazolylazo)-resorcinol,SCN~- and NO-2~- in a medium of H-2SO-4 and proposed,an spectrophotometry to determine NO-2~-.The maximum absorption of ion association is at λ=366 nm in H-2SO-4.The molar absorptivity is {1.08×}{10~4} {L·mol~{-1}·cm~{-1}},the content of NO-2~-(in ρ(NO-2~-)=0～2 μg/mL) is just in accordance with Beer's Law.The method can be used for determining trace NO-2~- in waters.

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What this paper is about

This paper studied the ion association system of protonated 4-(2-thiazolylazo)-resorcinol,SCN~- and NO-2~- in a medium of H-2SO-4 and proposed,an spectrophotometry to determine NO-2~-.The maximum absorption of ion association is at λ=366 nm in H-2SO-4.The molar absorptivity is {1.08×}{10~4} {L·mol~{-1}·cm~{-1}},the content of NO-2~-(in ρ(NO-2~-)=0～2 μg/mL) is just in accordance with Beer's Law.The method can be used for determining trace NO-2~- in waters.

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Available abstract

This paper studied the ion association system of protonated 4-(2-thiazolylazo)-resorcinol,SCN~- and NO-2~- in a medium of H-2SO-4 and proposed,an spectrophotometry to determine NO-2~-.The maximum absorption of ion association is at λ=366 nm in H-2SO-4.The molar absorptivity is {1.08×}{10~4} {L·mol~{-1}·cm~{-1}},the content of NO-2~-(in ρ(NO-2~-)=0～2 μg/mL) is just in accordance with Beer's Law.The method can be used for determining trace NO-2~- in waters.

Key concepts: Molar absorptivity, Resorcinol, Spectrophotometry, Chemistry, Protonation, Ion-association, Absorption (acoustics), Beer–Lambert law

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