'ı6 
The determination of the dissolved in- 
organic phosphate ee was carried out 
using an Auto-Analyzer II of the Technicon Co,, 
applying the phosphormolybdenum blue method, 
according to an analysis procedure of P, Mangelsdorf 
(1972). Two reagent solutions were used for analysis, 
Reagent Solution I contained sulphuric acid, ammonium 
molybdate, and potassium antimony tartrate, Reagent 
Solution II contained ascorbic acid, acetone, and 
"Levor IV" (Technicon), 
Flow rate of Reagent Solution I: 0,27 ml/min,. 
Flow rate of Reagent Solution II: 0.27 ml/min,. 
Flow rate of the seawater to be investigated: 
0.80 ml/min, 
Time of passage of the seawater through the whole 
system (from the sample taker to the cuvette):; 
ca, 8 min, 
No. of samples per hour: 10. 
Calibration substance: potr- iumdihydrogenphosnhate 
(KH„PO,). 
The dissolved oxygen was determined 
by titration according to H, Winkler, in the modified 
version used by K. Kalle (1939). 
Kalle, K, 
(1939): Einige Verbesserungen zur Be- 
stimmung des gelösten Sauer- 
stoffes im Meerwasser, 
Ann, Hydrogr. u,.marit. Met,673 
Ss, 267, 
Methodische Verbesserungen der 
Phosphat-Bestimmung im Meer- 
wasser mit dem Auto-Analyzser 
insbesondere für den Bordbe- 
trieb. 
Helgoländer wiss.,Meeresunters, 233 
S., 376 = 382, 
Mangelsdorf, P, (1972) 
*