Hach DR/700 - Page 70

1-52
Table 9. Required Containers, Preservation Techniques and
Holding Times
1
Maximum
Parameter No./Name Container
2
Preservation
3,4
Holding Time
5
Table 1A-Bacterial Tests:
1-4. Coliform, fecal P G Cool, 4°C, 0.008% 6 hours.
and total Na
2
S
2
O
3
6
5. Fecal streptococci P, G do do.
Table 1B-Inorganic Tests:
1. Acidity P, G Cool, 4°C 14 days.
2. Alkalinity P, G do do.
4. Ammonia P, G Cool, 4 °C, H
2
SO
4
28 days.
to pH< 2
9. Biochemical oxygen P, G Cool, 4 °C 48 hours.
demand
11. Bromide P, G None required 28 days.
14. Biochemical oxygen P, G Cool, 4 °C 48 hours.
demand, carbonaceous
15. Chemical oxygen P, G Cool, 4 °C, H
2
SO
4
28 days.
demand to pH< 2
16. Chloride P, G None required do.
17. Chlorine, total residual P, G do Analyze
immediately.
21. Color P, G Cool, 4 °C 48 hours.
24-24. Cyanide, total and P, G Cool, 4 °C, NaOH 14 days
7
.
amenable to chlorination to pH >12,
0.6g ascorbic acid
6
25. Fluoride P None required 28 days.
27. Hardness P, G HNO
3
to pH< 2, 6 months.
H
2
SO
4
to pH< 2
28. Hydrogen ion (pH) P, G None required Analyze
immediately
31,43. Kjeldahl and P, G Cool, 4 °C, H
2
SO
4
28 days.
organic nitrogen to pH < 2
Metals:
8
18. Chromium VI P, G Cool, 4 °C 24 hours.