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When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay should I use matched reagents, lysate/CSE?

You need to use matched reagents in order to comply with FDA requirements for endotoxin testing. Each Lonza LAL lot is tested for functionality using United States Reference Standard EC-7. We then match this LAL lot to a lot of our Control...

When preparing to run a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection kit how is the potency of CSE determined?

The RSE/CSE procedure used by Lonza to determine CSE potency is found on the Certificate of Analysis for each matched kit. In general, dilutions of endotoxin from multiple vials of CSE are tested unknowns compared to a series of standards produced...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay how should I handle the LAL reagent?

Lonza LAL reagent should be handled gently. After reconstitution, the contents of the vial will easily go into solution by either gently inverting or swirling the vial. Vortexing or vigorously shaking the reconstituted LAL reagent will cause it to...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay how should I prepare my sample for testing?

There are a few ways in which your sample can be prepared before testing it. Most samples only need to be diluted before they are tested with one of our endotoxin detection kits. In order to determine how far out you should dilute your sample, you...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay what pH should my sample be? What should I adjust it with?

Our endotoxin detection assays are optimized to work with samples with a pH range of 6-8. If the pH of your sample falls outside of this range you can adjust it with a buffer, or HCl or NaOH. Make sure the buffer you are using is endotoxin free by...

When storing my Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor (rFC), endotoxin detection kit the temperature of my refrigerator/freezer has been out of range. Are my reagents ok to use?

The normal storage temperature for LAL products is 2-8°C. The improper storage of the product for a short period of time should not cause a problem with the performance of the kit as long as the components have not been reconstituted. Lyophilized...

What are the advantages of the Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor (rFC), endotoxin detection assays over the rabbit test?

Lonza LAL and PyroGene™ rFC Endotoxin detection assays are faster, have greater sensitivity, show less variability,, are less expensive, and are an alternative to animal model testing. These assays allow higher throughput and can also be automated on...

How should I properly heat my Lonza QCL-1000™ Endpoint LAL Bacterial Endotoxin Test (BET) Assay?

Incubation is another area where assay performance can be affected. We recommend the use of a dry bath and heat block combination that is capable of maintaining 37 ±1 °C. The temperature should be monitored with a calibrated thermometer and checked...

How should I handle the reconstituted Lonza LAL PYROGENT™ Gel Clot Bacterial Endotoxin Testing (BET) Reagent?

Rehydrated LAL reagent may be stored for as long as 24 hours, but it must be kept at 2-8 °C. Do not pre-incubate lysate in the LAL test tubes before adding samples to them. This is not necessary and may cause sensitivity loss in the LAL reagent. If...

How do I handle my Lonza Control Standard Endotoxin (CSE) for Bacterial Endotoxin Testing (BET)?

Lyophilized E. coli endotoxin should be stored at 2-8°C. Endotoxin solutions are generally very stable upon storage except at more dilute concentrations. Rehydrated E. coli endotoxin should be stored refrigerated only (at 2-8°C and not frozen)....

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