Chlorine: Silver Nitrate addition, Precipitation and Sulfate Removal

### Intended Learning Objectives

1. **Precipitate silver chloride from solution** by heating samples, adding silver nitrate under controlled conditions, and allowing proper settling to ensure clear separation of the precipitate.

2. **Isolate and purify the precipitate** by carefully decanting supernatant, centrifuging to form a well-settled plug, and performing ammonium hydroxide washes to remove sulphur contamination.

3. **Ensure sulphur removal for AMS analysis** by precipitating sulphur as barium sulphate through the addition of saturated barium nitrate, refrigerating samples, and preparing for final filtration and target pressing.