Bronolab Liquid Milk Preservative | Advanced Instruments
Loading image...

Broad Spectrum MicroTabs

Broad Spectrum Microtabs II (BSM) is a tablet preservative containing a combination of Bronopol and Natamycin which prevents bacteria and yeast and mold. It is used to preserve milk samples, which will be analyzed on infrared instruments. It is an ideal preservative solution for longer-term preservation of milk samples when a short sample analysis turnaround time and refrigerated storage conditions cannot be guaranteed. It is available in convenient dispenser packs containing 800 tablets and also in bulk tubs containing 35,000 tablets.

Highlighted features:
  • Long-lasting preservation
  • 14 Days without refrigeration
  • Non-interfering



18 mg tablet contains 8 mg Bronopol and 0.30 mg Natamycin inhibits BOTH bacteria and yeast & mold, provides extended shelf, and reduces lipolysis in milk samples


BSM tablets dissolve quickly in the milk sample. For added convenience BSM is available in either a tablet dispenser or a bulk tub container.


Specially formulated to minimize interference with Infrared test results using normal laboratory techniques on traditional components


BSM has a 4 year shelf life and 1 tablet is enough to preserve a 20-40mL milk sample. Samples preserved with BSM can be held at room temperature (22-25ºC) for at least 14 days without sample degradation.


Dispenser eliminates direct handling of product; Non-irritating to skin, non-carcinogenic and non-mutagenic

Associated Products

Bronolab Liquid

Liquid Preservative Solution


822 Bronolab W-II Liquid Preservative, 1 L Bottle
953 Broad Spectrum Microtabs-II, 800 tablets/dispenser
954 Broad Spectrum Microtabs-II, 35,000 tablets/tub

Installation and Training

Expert installation and training, available only from Advanced Instruments.

Advanced Care Service Agreements

Get total peace of mind with a service agreement—to ensure protection in case of instrument down time.

Educational Resources


The Effect of Bronopol on the Freezing Point and Impedance of Milk Samples

We are open and continue to provide essential lab supplies during the COVID-19 pandemic. Answers to your FAQ’s can be found here.

Read More