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Test ID: NEZPP    
Zinc Protoporphyrin, Blood

Method Description Describes how the test is performed and provides a method-specific reference

Zinc protoporphyrin is measured on the Helena ProtoFluor-Z hematofluorometer using a multi-channel front surface photofluorometer. When the sample is exposed to 415 nm light, zinc protoporphyrin (ZPP) is excited and emits light at 595 nm. A second lens/filter system collects, filters and focuses the 595 nm light onto a photomultiplier tube (PMT). The PMT produces a current level in response to the light reaching it, which is proportional to the ZPP/heme ratio. During the 5 second reading, over 1,000 light-level readings are taken and averaged by the micro-computer and a value is displayed in mcmol ZPP/mol heme. (Instruction manual: Helena ProtoFluor-Z 7/2006)

Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Monday through Friday; 3rd shift

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

1 day

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

3 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

2 weeks

Performing Laboratory Location The location of the laboratory that performs the test

New England