BOD Testing

BOD Testing Product Lines:

Colitag

Buy 3 Boxes COD vials, Get 1 Box FREE!

Question/Answer

Where can I find the COA for this product?

You can go to the LabChem website and enter the Lot number to retrieve your COA. Here is the link:\r\n\r\nhttp://www.labchem.com/documents-reports/certificate-of-analysis.html \r\n

how can i use the pollyseed in the test BOD5

The BOD test requires an adequate microbial population in the sample in order for the oxygen depletion to occur. Oftentimes a generic microbe population is used when the quantity and quality of the bacterial population is not known. Additionally, the GGA standard does not naturally contain any microbes and needs to have a known amount added. The contents of one capsule are stirred into a volume of the BOD dilution water for one hour. After that, the insoluble bran is allowed to settle and the bacteria suspension is decanted off the top. A constant volume is added to the standards and samples. You should also set up sever bottles that contain just dilution water and seed in order to determine a seed correction so that you can factor out the oxygen depletion that is only contributed by the seed.

Do item numbers D1242-1L, D1241-1L, D1245-1L, and D1244-1L all need to be refridgerated? If not, which may be stored at room termperature? Thank you.

None of these items require refrigeration. They may all be stored at ambient conditions.

Is this in glass or plastic bottles? Can i get a typical COA for this?

This item comes in a plastic container.

what is the shelf life of the BOD reagents prepared and ready to use? do you sell them in a

The shelf life of the reagents is 24 months and must be kept refrigerated. We do sell these 4 reagents in a kit, part # D1500-1L for 1-liter bottles and part # D1500-100 for 100mL bottles.

how much of this do you add to a 300ml bod bottle?

This solution is prepared exactly in accordance with Standard Methods, 150 mg glucose/L and 150 mg glutamic acid/L. You would add 6 mL of this solution to one 300 mL BOD bottle to achieve the appropriate results.

how much per liter

This reagent is added to your source water in the amount of 1 mL per liter of dilution water you wish to make. If you wish to make 6 L of dilution water you would add 6 mL of each of the required reagents. The reagents can be purchased individually or as a set of 4, D1500.

what is the shelf life on all 4 reagents?

The Phosphate buffer, magnesium sulfate and ferric chloride have a shelf life of 24 months while the calcium chloride is 12 months.

are all the reagent mix and ready to use?

These reagents come in a set of 4 bottles; one each of phosphate buffer, calcium chloride, magnesium sulfate, and ferric chloride solutions. To use, you will add one mL of each bottle per liter of dilution water that you wish to prepare. For example, if you have 6 L of source water you would add 6 mL from each of the four reagent bottles to source water. After mixing, the dilution water is ready for use.

Do you sell a BOD buffer powder pillow that is ready to mix with the dilution water.

We offer a 4 bottle set that contains each of the required solutions to add to the source water to prepare BOD dilution water. The part number is D1500-100 for 100 mL bottles or D1500-1L for 1 liter bottle sizes. The instructions are to add 1 mL of each solution per liter of source water. If you were to use 6 liters of source water you would add 6 mL of each of the four solutions to the source water.

With the BOD 4-Bottle Set, how much is needed to make 1 liter?

These solutions are prepared exactly as stated in SM 5210B. You will add one mL of each of the 4 solutions to one liter of dilution water.

What is the shelf-life of this product once it has been opened?

Once opened the solution has a 30 day expiration.

what is the value (mg/ml) of solution LC148451 and is it certified

This solution is prepared according to the directions in Standard Methods. It contains 150 mg Glucose and 150 mg Glutamic acid per liter of solution. If analyzed according to the method, it will give the required BOD value of 198 ± 30.5 mg/L. This does come with a certificate of analysis.

Once the polyseed is added to nutrient water how long does it last

The manufacturer recommends holding the seed suspension for a total of 6 hours from rehydration.

How much volume does each capsule make?

The instructions state to use 500 mL of dilution water to rehydrate each capsule. However, this volume can be adjusted according to individual laboratory procedures to compensate for the source water, desired strength of seed or other factors.

Can disposable BOD bottles be used more than once?

We do not recommend reuse of the bottles. The coating on the inside of the bottle is what prevents the seepage of oxygen through the plastic. This coating can become compromised in the cleaning process.

What is the shelf life of the Polyseed capsules?

The shelf life of our Polyseed capsules is 2 years from the date of manufacture.

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