Minimum quantity of blood required to be preserved for chemical analysis is :
**Core Concept**
The minimum quantity of blood required for chemical analysis is a critical consideration in forensic and clinical medicine. This is because certain biochemical tests require a specific volume of blood to produce reliable results. The volume of blood needed for analysis can vary depending on the specific test being performed.
**Why the Correct Answer is Right**
The correct answer is 5 mL, which is the minimum quantity of blood required for most routine biochemical tests, including glucose, electrolytes, and liver function tests. This is because 5 mL of blood contains sufficient amounts of serum to run these tests accurately. The serum is the liquid component of blood that contains the necessary biochemical markers for analysis. The 5 mL volume is also sufficient to allow for repeat testing or retesting in case of any errors.
**Why Each Wrong Option is Incorrect**
**Option A:** 1 mL is too small a volume for most biochemical tests, as it may not contain sufficient amounts of serum for accurate analysis.
**Option B:** 10 mL is excessive for routine biochemical tests, as it may lead to unnecessary blood loss and increased risk of complications.
**Option C:** No information is provided for this option, making it an unclear choice.
**Clinical Pearl / High-Yield Fact**
The minimum quantity of blood required for chemical analysis is a critical consideration in emergency medicine, where timely diagnosis and treatment are essential. It is essential to consult with a laboratory professional or a medical toxicologist to determine the specific volume of blood required for each test.
**Correct Answer: D. 5 mL.**