No. Method Recommended range
for user calibration
323 Phosphate, ortho PP 0.1–2 mg/l PO
4
324 Phosphate, ortho TT 3 mg/l PO
4
327 Phosphate 1, ortho C 20–30 mg/l PO
4
328 Phosphate 2, ortho C 1–3 mg/l PO
4
325 Phosphate, total TT 0.3–6 mg/l P
326 Phosphate, hydr. TT 0.3–0.6 mg/L P
316 Phosphonate 1–2 mg/l PO
4
340 Potassium 3 mg/l K
350 Silica 0.5–1.5 mg/l SiO
2
351 Silica LR PP 1 mg/l SiO
2
352 Silica HR PP 50 mg/l SiO
2
212 Sodium hypochlorite 8 %
360 Sulfate PP 50 mg/l SO
4
355 Sulfate T 50 mg/l SO
4
365 Sulfide 0.2–0.4 mg/l S
370 Sulfite 3–4 mg/l SO
3
384 Suspended Solids operating range
386 Turbidity operating range
390 Urea 1–2 mg/l CH
4
N
2
O
400 Zinc 0.2–0.4 mg/L Zn