GE Healthcare Life Sciences - Radioactivity and Radiation

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Pro-Mix — Concentration of cysteine and methionine

Q. What is the concentration of cysteine and methionine in Pro-Mix formulations? A. The Methionine / Cysteine ratio in Pro-Mix products is approximately 70:30. Therefore on the reference date, the ...

32P Radiochemicals — "Cerenkov" Counting

Q. What is Cerenkov counting? Q. What is Cerenkov Counting? A. Cerenkov counting is the detection of radiation generated by charged particles passing through a medium faster than the velocity of ...

3H-Radiochemicals—Stability, Decomposition, and Shelf-Life

Q. Why do 3H-labeled compounds decompose so quickly, and how can I estimate the shelf-life expected for a 3H-labeled radiochemical? Shelf Life, Usable Period, and Purity We aim to put 3H (and 14C) ...

Autoradiography Film — Exposure Temperature and Sensitivity

Q. At what temperature should autoradiography film be exposed? A. In situations where there are very low amounts of radioactivity, or when fluorography reagents or intensifying screens are being ...

BCS-NA Scintillation Cocktail — pH Neutralization of Samples

Q. Why must I neutralize the pH of solubilized samples prior to adding biodegradable BCS-NA scintillation cocktail? A. Biodegradable scintillation cocktails use a biodegradable emulsifier ...

BCS Scintillation Cocktail — pH Neutralization of Samples

Q. Why must I neutralize the pH of solubilized samples prior to adding biodegradable BCS scintillation cocktail? A. Biodegradable scintillation cocktails use a biodegradable emulsifier intermediate ...

Radioactives — Blocking 32P bremmsstrahlung X-rays

Q. Can I block 32P bremmsstrahlung X-rays with lead shields and aprons? A. Bremsstrahlung or "braking radiation" is the emission of electromagnetic (X-ray) radiation caused by the slow of charged ...

Radiochemicals — Typical Counting Efficiencies for Isotopes

Q: What are the Typical Counting Efficiencies for Commonly Used Isotopes? A: The following information is in the public domain and from various internet sources and has not been internally validated ...

Radiochemicals — What is Bremmsstrahlung?

Q. What is Bremmsstrahlung? A. Bremsstrahlung literally means "braking radiation" and is commonly detected by Geiger counter probes, leading consumers to believe there is a surface contamination. ...

Redivue Formulation — Physicochemical Properties

Q: Is the Redivue dye and stabilizer chemically attached to radiolabeled product? A: The identity of stabilizer and dye used in the Redivue formulated radioactive products is proprietary. However, ...

Redivue Formulation — Storage Recommendations

Q. What is Redivue formulation and how are Redivue products stored? A. The 'Redivue' formulation of GE Healthcare radiochemicals contains a proprietary dye and stabilizer. The Redivue stabilizer ...

Scintillation Cocktails — Key Features for Choice & Use

Q. What key factors affect scintillation cocktail performance? A. For optimal detection sensitivity and accuracy, a good scintillation cocktail should have: 1) High Counting Efficiency: Counting ...

Sodium 125-I Iodide — 126-I content and effect on labeling

Q. Will the 126-I content of IMS30/IMS300 (Sodium 125-I Iodide), have any effect on labeling efficiency? A. 126-I will have no effect on the labeling efficiency of 125-I, but it should be noted that ...

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