Calcium standard solution Pakistan

Calcium Standard Solution – Specifications

1. Chemical Name:
Calcium Standard Solution

2. Typical Concentrations Available:

• 1000 mg/L (ppm) Ca
• 1000 mg/L Ca²⁺ (as CaCO₃ equivalent also common)
• Other prepared concentrations: 10 mg/L, 100 mg/L, 500 mg/L depending on analytical use

3. Composition & Purity:

• Prepared from high-purity calcium salts (typically Calcium Carbonate or Calcium Chloride, analytical grade).
• Diluted in deionized or distilled water.
• Contains no interfering ions above trace levels.

4. Appearance:

• Clear, colorless aqueous solution

5. Density:

• Approximately equal to water (≈ 1.00 g/mL), slightly variable depending on concentration.

6. pH:

• Usually slightly acidic (≈ 2–3) if stabilized with dilute nitric or hydrochloric acid to prevent precipitation.

7. Stability:

• Long-term stable when stored in tightly capped polyethylene or glass bottles.
• Avoid contact with carbon dioxide to prevent carbonate formation.

8. Intended Use:

• Calibration of atomic absorption spectroscopy (AAS)
• ICP-OES and ICP-MS calibration
• Photometric and titrimetric methods involving calcium quantification
• Water testing and environmental laboratory use

9. Storage Conditions:

• Store at room temperature (15–30°C)
• Protect from contamination and evaporation
• Keep away from strong alkalis (to prevent Ca precipitation)

10. Safety Notes:

• Non-hazardous at typical calibration concentrations
• Acidic solutions may cause minor irritation
• Wear gloves and eye protection during handling