OBJECTIVE: Ambient-temperature storage of urine samples would increase the variety of
life sciences studies that could be performed during spaceflight. The purpose of this study …

Objectives Laboratories determine the most appropriate approach for the collection and
transport of urine specimens. We investigated the effect of a chlorhexidine-based …

Abstract The Mandatory Guidelines for Federal Workplace Drug Testing Programs provide
criteria for specimen validity testing, including urine pH cut-offs, to report a urine specimen …

Objective To examine the long-term stability and validity of analyte concentrations of 21
clinical biochemistry parameters in 24-h urine samples stored for 12 or 15 yr at− 22° C and …

Trace-level analysis of environmental chemicals in human specimens can be compromised
by contamination introduced during sample collection and storage. Sampling devices and …

Abstract Urinary 5-hydroxyindoleacetic acid (5-HIAA), vanillylmandelic (VMA), homovanillic
acid (HVA), catecholamines and metanephrines are produced in excess by catecholamine …

Collection of urine samples in human studies involves choices regarding shipping, sample
preservation, and storage that may ultimately influence future analysis. As more studies …

Laboratory contamination is a relatively broad, diverse, and often overlooked concern in the
clinical laboratory. All clinical specimens have the potential to harbor infectious disease …

Urinalysis is one of the most important tests in the clinical laboratory. In this study we
assessed the use of chemical preservative in urinalysis during preanalytical phase. Fifty first …

Background: Preservation of urine samples is important for centralised laboratory services
with automated instruments. Methods: A multicentre evaluation was carried out to assess …