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Bacteria in Water Test Kit Coliform & E Coli (487197) 48 Hour Result

Model #: 487197
$7.95 This item is not available online. eMail sales at InspectUSA.com for our best pricing as well as quantity discounts and Lead Time.

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Category Water Testing

Special Order Item. Full cases of 12 only.
Allow 14 to 21 days for delivery.

Coliform bacteria produce the enzyme β-D-galactosidase which splits the enzyme substrate 5- bromo-4-chloro-3-indolyl-β-D-galactoside (X-GAL). A colored end product is produced; if coliforms are present the liquid sample turns a blue-green color.

E. coli produces the enzyme β3 -D-glucuronidase, which breaks down the enzyme substrate 4- methylumbelliferyl-β-D-g1ucuronide (MUG) to generate an end product. The sample is illuminated with a UV light at about 365nm; if E. coli is present the sample will glow a bright blue, fluorescent, color.

Procedure:

  • Wash your hands thoroughly with soap and water
  • Carefully remove the bottle cap; do not touch the inside of the cap or bottle opening. Fill with l00mls of the water sample to be tested (about " below the neck of the bottle). Do not overfill. Securely recap the bottle.
  • Shake the bottle vigorously until all the media is dissolved. The solution should be clear yellow in color (a bit less clear with turbid samples)
  • Incubate the sample for:
    • 24 hours at 95 F (35 C) or
    • 48 hours at 77 F (25 C)

Coliform Confirmation:

  • After the 24 hour or 48 hour incubation time (based on temperature) observe the color of the sample:
    • Clear yellow negative for coliforms
    • Blue-green = positive for coliforms

E. coil Confirmation:

  • Shine a UV light (approximately 365nm) from the bottom of the sample. (Avoid looking directly at the light).
    • No fluorescence negative for E. coli
    • Bright blue fluorescence = positive for E. coli .

If further confirmation of E. coli is desired add 1 ml of Kovacs Indole reagent (sold separately) to the sample, recap the bottle, and wait 30 seconds. A red ring will form if E. coli is present.

UPC: 809762871978
Search Category: Hardware > Tools > Measuring Tools & Sensors
First Product Previous Product Product 25 of 37 Next Product Last Product
Category Water Testing
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