water conductivity in the washer disinfector

« Back to Previous Page
0
0

hi,
an engineer has reported that the water sample tested had a raised level of salicates. I have asked our biomed person to follow up on same he has advised the following:
Phosphates and silicates act to concentrate chloride ions and so promote their corrosive effects, chloride is well below permitted levels and the silicate reading of .75 is just above the guidance level of .2 .
he told me not to be concerned with same. however I would like to know if he is correct.

RESOLVED
Marked as spam
Posted by niamhoc (ireland) (Questions: 5, Answers: 2)
Asked on September 26, 2016 1:24 pm
894 views
0
Private answer

Hello Niamhoc,
AS/NZS 4187:2014 Table 7.2 recommends that Silicates levels for the final rinse is limited to 0.2 mg/L. A silicate reading of 0.75 means it is 375 per cent above the recommended limit.

It is a well documented fact that issues with the DI water or the RO water plant is one of the prime reasons for high levels of silicates. It would be worthy to take a look at the ion exchangers in the water treatment plant.

The good part of this is the fact that silicate deposits rarely cause serious harm to the medical device. It is more of an aesthetic effect. We usually see discolouration and grain like spots on the surface of the medical device.

Cheers my friend, Take care

Ravi Nayak

Marked as spam
Posted by Ravi Nayak (New Zealand) (Questions: 1, Answers: 15)
Answered on September 29, 2016 10:29 pm
0
Private answer

Thanks Ravi,
I have advised that the ion exchanger in the R/O is looked at.
niamh

Marked as spam
Posted by niamhoc (ireland) (Questions: 5, Answers: 2)
Answered on September 30, 2016 9:25 am