Welcome to the Refreshed Chemopharm Webstore!
 

Presence-Absence Broth 500 grams/bottle

SKU
CDL/2061
Brand
CONDALAB
Pre-order (Deliver in 8 to 12 weeks)
Login For Price
Presence-Absence Broth is used for the detection of coliforms in treated water. The Presence-Absence (P-A) test is a presumptive detection for coliforms in water. The test is a simple modification of the multiple-tube procedure. One test sample (100 mL) is inoculated into a single culture bottle to obtain qualitative information on the presence or absence of coliforms, through the presence or absence of lactose fermentation. This test is based on the principle that coliforms and other pollution indicator organisms should not be present in a 100 mL water sample. Comparative studies with the membrane filter procedure indicate the P-A test may maximize coliform detection in samples containing many organisms that could overgrow coliform colonies and cause problems in detection. The P-A test is described in standard methods for water testing by US EPA. Pancreatic digest of casein, peptone, proteose peptone and beef extract provides nitrogen, vitamins, minerals and amino acids essential for growth. Lactose is the fermentable carbohydrate as carbon and energy source. Sodium chloride supplies essential electrolytes for transport and osmotic balance. Sodium lauryl sulfate is the selective agent used to inhibit organisms other than coliforms. Bromocresol purple is a pH indicator. The potassium salts have a high buffering capacity lactose-fermenting organisms turn the medium from purple to yellow with or without gas production.
More Information
Brand CONDALAB
Write Your Own Review
You're reviewing:Presence-Absence Broth 500 grams/bottle
Your Rating
More from CONDALAB
Who Viewed This Also Viewed
  1. Standard Cole-Parmer 100US
    Standard Cole-Parmer 100US Brand: COLE-PARMER SKU: CP/OO/O/P-00652-64
    Login For Price
  2. Uniflo 2, 13mm Nylon 0.45µm 500/pk
    Uniflo 2, 13mm Nylon 0.45µm 500/pk Brand: WHATMAN SKU: WH/99101304
    Login For Price
  3. Wash Bottles PA 500ml 6/pk
    Wash Bottles PA 500ml 6/pk Brand: COLE-PARMER SKU: CP/OO/O/P-06054-10
    Login For Price
  4. ST Extraction Thimbles 33x80mm/25
    ST Extraction Thimbles 33x80mm/25 Brand: WHATMAN SKU: WH/MA/DO/2800338
    Login For Price
  5. Set spin bars, cylindrical, PTFE-coated, (25, 40, 50 mm each)
    Set spin bars, cylindrical, PTFE-coated, (25, 40, 50 mm each) Brand: HEIDOLPH SKU: HD/509-56000-00
    Login For Price