How would you detect the presence of peroxide in the old samples (kept for a long time) of ethers?

Explanation

To detect the presence of peroxides in old samples of ethers, follow these steps:

### Step-by-Step Solution:

1. **Understanding Ether Decomposition**:
- Ethers, when kept for a long time, can react with oxygen in the air and light, leading to the formation of peroxides. For example, diethyl ether (CH3CH2OCH2CH3) can form peroxides like hydroperoxide.

2. **Preparation for Detection**:
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