Hach DR/700 Procedures Manual page 70

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