In Ohotolidine Arsenite test errors caused by the presence of interfering substances are overcome for all except:
**Core Concept**
The Ohotolidine Arsenite test is a method used to detect the presence of glucose in urine. It relies on the oxidation of glucose by arsenite in the presence of o-tolidine, resulting in a colored product. The test is susceptible to interference by various substances that can react with arsenite or o-tolidine, leading to false positives or false negatives.
**Why the Correct Answer is Right**
The Ohotolidine Arsenite test is designed to overcome errors caused by substances like ascorbic acid, which can reduce arsenite and prevent the oxidation of glucose. However, the test is not effective against substances that can react with o-tolidine directly, such as phenols. These substances can produce a false positive result by reacting with o-tolidine, even in the absence of glucose.
**Why Each Wrong Option is Incorrect**
**Option A:** Not provided
**Option B:** This is not a correct option; the Ohotolidine Arsenite test is indeed susceptible to interference by substances like ascorbic acid.
**Option C:** This is not a correct option; the Ohotolidine Arsenite test is not specifically designed to overcome errors caused by bilirubin.
**Option D:** This is not a correct option; the Ohotolidine Arsenite test is not specifically designed to overcome errors caused by uric acid.
**Clinical Pearl / High-Yield Fact**
Substances that can react with o-tolidine directly, such as phenols, can produce false positive results in the Ohotolidine Arsenite test. This is an important consideration when interpreting test results, particularly in cases where the patient may be taking medications or have a medical condition that could affect the test.
**Correct Answer: D. Uric acid.