Page 36 - Feed Lab

Laboratory Water Suguna Management System Ver 1.0 / SOP / FQL / P1 - 05 Page 2 of 2

Standards for to be used in analytical operations
Parameter Grade of water
pH at 25 C * * 6.0-7.5
o
o
Electrical conductance, ms/m at 25 C 0.01 0.1 0.5
Oxidisable matter (equivalent to mg oxygen 1/L) # 0.08 0.4
Absorbance at 254 nm, 1 cm cell 0.001 0.01 ++
Residue after evaporation, mg/kg # 1.00 2.00
SiO content, mg / l 0.01 0.02 ++
2
pH measurements is highly purified water are difficult;
results are of doubtful significance.
#Not applicable.
++ Not specified.

Prepared by : Approved by :
26 Director - Technical