- Test-strip containing merocyanine and nitro or nitroso substituted polyhalogenated phenol-sulfonephthaleins as protein indicators
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The present invention provides an analytical test strip for the detection of protein in a biological sample including a novel combination of protein error indicators. The invention includes, in combination, a partially halogenated phenolsulfonephthalein protein error indicator having nitro or nitroso substituent groups in the B and/or C rings and a merocyanine protein error indicator.
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- Nitro or nitroso substituted polyhalogenated phenolsulfonephthaleins as protein indicators in biological samples
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The present invention provides a novel group of protein error indicators including nitro or nitroso substituent groups in the B and C rings of a partially halogenated triphenylmethane compound. Di-nitro or nitroso substituted protein error indicators of the present invention are represented by the structural formula: wherein: X is -Cl, -Br, -I; Y is -NO2 or -NO; and Z is -Cl, -Br, -I. Mono-nitro or nitroso protein error indicator compounds of the present invention are illustrated by the following formula: wherein: X is -Cl, -Br, -I; Y' is -NO2 or -NO; Y'' is -Cl, -Br, -I; and Z is -Cl, -Br, -I.
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