Since hemoglobin is measured spectrophotometrically on hematology analzyers, interference from lipemia or icteric specimens can lead to decreased light detected and measured through the sample and therefore inaccurate hemoglobin results occur.
On an electronic cell counter, hemoglobin determination may be falsely elevated caused by the presence of:

Caffeine benzoate solution is used to split the unconjugated bilirubin protein complex releasing the bilirubin so that it can react with diazotised sulphanilic acid. The tartrate buffer creates an alkaline solution and converts the red acid bilirubin to a green coloured compound which can be measured spectrophotometrically.
Which substance is used in the Jendrassik-Grof method to accelerate the reaction of unconjugated bilirubin with the diazo reagent?

Measures Light scatter by particles - Nephelometer
Measures change in vapor pressure - Osmometer
Measures amount of electricity passing between two electrodes - Coulometry Measures absorbance of light at a specific wavelength - Spectrophotometer Lab operations Matching
1. Measures Light scatter by particles
2. Measures change in vapor pressure
3. Measures amount of electricity passing between two electrodes
4. Measures absorbance of light at a specific wavelength

What additional fraction would be seen if plasma rather than serum was subjected to electrophoresis:

Any oxidase-positive organism can be excluded from the Enterobacteriaceae. The other characteristics are as a rule present in these organisms.
Which of the following is not true about members of the Enterobacteriaceae: