Term
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Definition
double indicator system
methyl red & bromothymol blue |
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Term
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Definition
| sodium nitroprusside reaction |
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Term
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Definition
| ketones react with sodium nitroprusside in an alkaline medium to produce a violet color |
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Term
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Definition
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Term
| Ketones Test False Positive |
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Definition
| medications, dehydration, ascorbic acid |
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Term
| Ketones Test False Negative |
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Definition
high fat diets
starvation |
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Term
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Definition
hemoglobin reduces peroxide like chemical which produces water and oxygen
oxygen oxidizes chromogen resulting in color change |
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Term
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Definition
5 - 10 RBCs/uL
0.015mg/dL hemoglobin |
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Term
| Blood Test False Positive |
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Definition
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Term
| Blood Test False Negative |
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Definition
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Term
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Definition
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Term
|
Definition
glucose in presence of glucose oxidase forms gluconic acid and hydrogen peroxide
H2O2 in presense of peroxidase forms water and oxygen
oxygen binds to the chromogen |
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Term
| Glucose Test False Negative |
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Definition
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Term
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Definition
| protein error of indicators |
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Term
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Definition
at a pH of 3, tetrabromphenol blue releases hydrogen ions in the presence of albumin
exchange of H+ between albumin and indicator produces color change |
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Term
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Definition
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Term
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Definition
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Term
| Protein Test False Positive |
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Definition
highly buffered urine
alkaline urine |
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