Cations in tap water were analyzed using IC YK-421.
At present, ion chromatogaraphy is not used for in Japanese regulations for tap water. However, ion chromatography is very useful method for the simultaneous analysis of monovalent and divalent cations such as Na+, K+ and Mg2+.
Sample : 15micro-L
|
No.
|
Cations
|
std.
|
|
|
1
|
Li+ |
2mg/L
|
–
|
|
2
|
Na+ |
10mg/L
|
|
|
3
|
NH4+ |
10mg/L
|
–
|
|
4
|
K+ |
20mg/L
|
|
|
5
|
Ca2+ |
20mg/L
|
|
|
6
|
Mg2+ |
10mg/L
|
Column : Shodex IC YK-421 (4.6mmID*125mm)
Eluent : 5mM Tartaric acid + 1mM Dipicolinic acid + 1.5g/L Boric acid aq.
Flow rate : 1.0mL/min
Detector : Shodex CD
Column temp. : 40°C
