Specific gravity adjustment of urine analysis results

Graul, Robert J.; Stanley, Russell

doi:10.1080/15298668291410701

Cited by 22 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other methods of obtaining an estimate of 24-h excretion include normalisation by volume (with or without a correction for specific gravity) and normalisation by the length of the sampling interval. The relative merits of the various normalisation methods have been discussed by a number of authors (Jackson, 1966; Graul and Stanley, 1982; Boeniger et al., 1993; Kim, 1995; Duke, 1998; NCRP, 2008). Tritium in the form of tritiated water is an exceptional case for which it is usual to take only a small sample, and to relate the measured activity concentration to the concentration in body water.…”

Section: Methods Of Individual and Workplace Monitoringmentioning

confidence: 99%

ICRP Publication 130: Occupational Intakes of Radionuclides: Part 1

Paquet¹,

et al. 2015

View full text Add to dashboard Cite

This report is the first in a series of reports replacing Publications 30 and 68 to provide revised dose coefficients for occupational intakes of radionuclides by inhalation and ingestion. The revised dose coefficients have been calculated using the Human Alimentary Tract Model (Publication 100) and a revision of the Human Respiratory Tract Model (Publication 66) that takes account of more recent data. In addition, information is provided on absorption into blood following inhalation and ingestion of different chemical forms of elements and their radioisotopes. In selected cases, it is judged that the data are sufficient to make material-specific recommendations. Revisions have been made to many of the models that describe the systemic biokinetics of radionuclides absorbed into blood, making them more physiologically realistic representations of uptake and retention in organs and tissues, and excretion. The reports in this series provide data for the interpretation of bioassay measurements as well as dose coefficients, replacing Publications 54 and 78. In assessing bioassay data such as measurements of whole-body or organ content, or urinary excretion, assumptions have to be made about the exposure scenario, including the pattern and mode of radionuclide intake, physical and chemical characteristics of the material involved, and the elapsed time between the exposure(s) and measurement. This report provides some guidance on monitoring programmes and data interpretation.

show abstract

Section: Methods Of Individual and Workplace Monitoringmentioning

confidence: 99%

ICRP Publication 130: Occupational Intakes of Radionuclides: Part 1

Paquet¹,

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The resulting concentrations were corrected to a relative density of 1.024. 29 The urinary chromium concentration ran from 0-0084 to 0-0367 jmol/l. The contents were higher on Thursday afternoon and a comparison of the Monday and Thursday values with a paired t test indicated a significant difference at the 5% level (t5 = 3 29).…”

mentioning

confidence: 99%

Risk of lung cancer among masons in Iceland.

1997

View full text Add to dashboard Cite

“…Before use, a refractometer is calibrated and verified with water. Additionally, several authors have proposed a correction formula for USG . Typically, only a few drops of liquid are used for measurements.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, several authors have proposed a correction formula for USG. 26,27 Typically, only a few (c) laboratory refractometers, "Abbe" or "Pulfrich"; (d) inline process refractometes; and (e) high precision refractometers which can be used to measure SG in urine. 21,24,28,29 The aim of this study was to (a) develop a new in-house urine material which can be used for the verification of laboratory refractometers to measure SG in urine samples; (b) generate stability and homogeneity data; and (c) provide proficiency test data in collaboration with ISO/IEC 17025 accredited laboratories.…”

Section: Introductionmentioning

confidence: 99%

Development of in‐house materials for the verification of specific gravity measurements: Homogeneity, stability, and proficiency studies

Velasco-Bejarano

Mercado

Camacho

et al. 2019

Drug Testing and Analysis

View full text Add to dashboard Cite

We developed and evaluated the properties of in‐house urine reference materials for the verification of laboratory refractometers, which are frequently used in clinical chemistry and doping testing laboratories. Urine was gathered from 26 healthy volunteers (16 male 30 ± 5 years old and 10 female 29 ± 4 years old), from which two urine batches were obtained: one with a low specific gravity (1.012± 0.003) and the other with a high specific gravity (1.027 ± 0.003). Homogeneity studies were conducted over 20 consecutive days. For short‐term stability studies, aliquots of both urine batches were stored at −20 ± 2°C; 3 ± 2°C; 20 ± 2°C; 45 ± 2°C for 0, 2, 7, 14 and 35 days, under both light and dark conditions. Similarly, another study was conducted to measure the long‐term stability of urine at −20 ± 2°C, over a 24‐month evaluation period. Our data showed that the urine was homogeneous and stable at −20 ± 2°C, 3 ± 2°C, 20 ± 2°C, and 45 ± 2°C under both light and dark conditions. In all cases, the urine was evaluated by specific gravity and no statistically significant differences (p ≤ 0.05) were recorded. Additionally, a proficiency test was conducted in collaboration with 15 ISO/IEC 17025 accredited laboratories, and z‐scores and performance factors were evaluated. These data indicate that this material could be used for the verification of refractometers.

show abstract

Specific gravity adjustment of urine analysis results

Cited by 22 publications

References 0 publications

ICRP Publication 130: Occupational Intakes of Radionuclides: Part 1

ICRP Publication 130: Occupational Intakes of Radionuclides: Part 1

Risk of lung cancer among masons in Iceland.

Development of in‐house materials for the verification of specific gravity measurements: Homogeneity, stability, and proficiency studies

Contact Info

Product

Resources

About