Table 1.
Limit specified of physicochemical parameters in drinking water sources (CJ3020-93).
| Parameters | Limit | Analytical Methods | Detection Criteria |
|---|---|---|---|
| Potassium (K+) | N/A | Flame photometer | (MHPRC, GB/T 5750.6-2006) |
| Sodium (Na+) | N/A | Flame photometer | (MHPRC, GB/T 5750.6-2006) |
| Fluoride (F−) | 1.0 | Ion selective electrode | (MHPRC, GB/T 5750.5-2006) |
| pH | 6.5–8.5 | pH-meter | (MHPRC, GB/T 5750.4-2006) |
| Chloride (Cl−) | 250 | Titrimetric | (MHPRC, GB/T 5750.5-2006) |
| Total Alkalinity (TAlk) | N/A | Titrimetric | (EPBPRC, 2002) |
| Sulfate (SO42−) | 250 | Spectrophotometric | (MHPRC, GB/T 5750.5-2006) |
| Total Dissolved Solids (TDS) | 1000 | Gravimetric | (MHPRC, GB/T 5750.4-2006) |
Note 1: Units for all parameters are mg L−1 except pH. Note 2: N/A: not available.