George Martin wrote that Hanna makes a silver tester.
YUP. I just looked it up on their web page.
http://www.hannainst.com/products/ion/93737.htm You're right. Below is
what their web page says. They've gone home for the night, but I wonder if
the reagent set is needed. If so, this would be $250 for a silver tester.
Ouch.
Meanwhile, I got hold of the lab that did the tests for NutriTeam (the GfSE
makers). They helped me understand the difference between a microbial
challenge test and a Minimim Inhibitory Concentration test. The Microbial
Challenge takes a predetermined number of bacteria and checks regularly to
see how many are left after being exposed to the bactericidal agent. The
Minimum Inhibitory Concentration Test checks to see how effectively the
agent prevents growth of the microorganism. The lab said it would charge
about $750 for an MIC test.
Bob Wells
HI 93737 Silver Meter
High Sensitivity The Hanna HI 93737 measures silver fro
m 0 to 0.6 mg/L in steps of 1/1000th of
mg/L. This high resolution ensures better accuracy when
keeping a tab on silver discharges.
Easy-to-use HI 93737 measures only silver and weighs ab
out half a pound so that quick tests can
be easily performed even by non-technical staff on-site
.
Supplied with Starter Kit This instrument comes complet
e with 2 cuvets, caps, 9V battery and
instruction manual.
Suggested Retail Price: HI 93737: $149.00*
Reagents Sets
HI 93737-01: (Ag) $102.00*
HI 93737-03: (Ag) $303.00*
Order Information
Specifications
* (Valid only in USA)
Small quantities of silver are bacteriostatic or bactericidal. As a result,
it is at times used in disinfection of pools and spas, as
well as in water filters. However, presence of silver in water is generally
indicative of pollution with film manufacturers and
processors on the one hand and the surface finishers on the other as the ma
in contributors. In fact, silver levels are closely
monitored in these sectors since its presence can have an economic cost and
in the body cause discoloration of skin, eyes and
mucous membranes.
Specifications:
HI 93737 (Ag)
Range
0 to 0.600 mg/L
Resolution
0.001 mg/L
Accuracy (@ 68°F/20°C)
±0.005 mg/L
±4% of reading
Typical EMC Deviation
±0.001 mg/L
Light Source
Light Emitting Diode @ 555 nm
Light Life
Life of the Instrument
Light Detector
Silicon Photocell
Battery Type/Life
1 x 9V / Approx. 40 hours of continuous u
se.
Auto-shut off after 10 minutes of non-u
se
Environment
32 to 122°F (0 to 50°C); RH 95%
Dimensions
7.1 x 3.3 x 1.8" (180 x 83 x 46mm)
Weight
10 oz. (290 grams)
