Compilation, quality control, analysis, and summary of discrete suspended-sediment and ancillary data in the United States, 1901-2010

A method for the determination of polychlorinated biphenyls (PCBs) in caulk and glazing materials was developed and evaluated by application to a combination of 36 samples of caulk and glazing materials, from four schools in the northeastern area of the United States. Quality control analysis showed a range of 45 to 170% for spike recovery from the various samples and a range of 10.9 to 20.1% difference in precision among replicates. The result for the samples analyzed showed that three of the four schools sampled contained caulking and glazing materials with levels of PCBs >50 μg/g (range 54.6 μg/g to 445,000 μg/g). Across the four schools, 24% of collected caulk and glazing samples contained elevated PCB levels relative to the U.S. Environmental Protection Agency’s (EPA) bulk product waste criterion of 50 μg/g under “The Frank R. Lautenberg Chemical Safety for the 21st Century Act.” The PCBs determined in the samples, exhibited characteristic chromatographic patterns similar to those of Aroclors 1242, 1248, 1254, 1260, 1262, and a 1016/1254 mix.

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Quality Control Analysis of Safoof-e-Pathar Phori, A Unani Herbo-mineral Formulation

Planta Medica ◽

10.1055/s-0031-1274878 ◽

2011 ◽

Vol 77 (05) ◽

Author(s):

W Ahmad ◽

MS Khan ◽

SMA Zaidi ◽

SS Jameel ◽

S Ahmad

Keyword(s):

Quality Control ◽

Control Analysis ◽

Quality Control Analysis

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Quality Control of Data in a Large-Scale Cancer Register Program

Methods of Information in Medicine ◽

10.1055/s-0038-1636339 ◽

1966 ◽

Vol 05 (02) ◽

pp. 67-74 ◽

Cited By ~ 5

Author(s):

W. I. Lourie ◽

W. Haenszeland

Keyword(s):

United States ◽

Quality Control ◽

Cancer Patients ◽

Large Scale ◽

The United States ◽

Newly Diagnosed ◽

Related Data ◽

Cancer Register ◽

Independent Review ◽

End Results

Quality control of data collected in the United States by the Cancer End Results Program utilizing punchcards prepared by participating registries in accordance with a Uniform Punchcard Code is discussed. Existing arrangements decentralize responsibility for editing and related data processing to the local registries with centralization of tabulating and statistical services in the End Results Section, National Cancer Institute. The most recent deck of punchcards represented over 600,000 cancer patients; approximately 50,000 newly diagnosed cases are added annually.Mechanical editing and inspection of punchcards and field audits are the principal tools for quality control. Mechanical editing of the punchcards includes testing for blank entries and detection of in-admissable or inconsistent codes. Highly improbable codes are subjected to special scrutiny. Field audits include the drawing of a 1-10 percent random sample of punchcards submitted by a registry; the charts are .then reabstracted and recoded by a NCI staff member and differences between the punchcard and the results of independent review are noted.

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