Feasibility study of a reference material for water chemistry: Long term stability of triazine and phenylurea residues stored in vials or on polymeric sorbents

Water matrix certified reference material (MCRM) of volatile organic compounds (VOCs) is used to provide quality assurance and quality control (QA/QC) during the analysis of VOCs in water. In this research, a water MCRM of 28 VOCs was developed using a “reconstitution” approach by adding VOCs spiking, methanol solution into pure water immediately prior to analysis. The VOCs spiking solution was prepared gravimetrically by dividing 28 VOCs into seven groups, then based on ISO Guide 35, using gas chromatography-mass spectrometry (GC-MS) to investigate the homogeneity and long-term stability. The studies of homogeneity and long-term stability indicated that the batch of VOCs spiking solution was homogeneous and stable at room temperature for at least 15 months. Moreover, the water MCRM of 28 VOCs was certified by a network of nine competent laboratories, and the certified values and expanded uncertainties of 28 VOCs ranged from 6.2 to 17 μg/L and 0.5 to 5.3 μg/L, respectively.

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Development of a Paste-type Certified Reference Material of Tomato for Elemental Analysis: Certification and Long-term Stability Study

Bulletin of the Korean Chemical Society ◽

10.1002/bkcs.11066 ◽

2017 ◽

Vol 38 (2) ◽

pp. 211-218 ◽

Cited By ~ 3

Author(s):

Jiha Choi ◽

Euijin Hwang ◽

Yong-Hyeon Yim ◽

Hang Mi Jo ◽

Youngran Lim ◽

...

Keyword(s):

Reference Material ◽

Certified Reference Material ◽

Elemental Analysis ◽

Stability Study ◽

Term Stability ◽

Long Term Stability

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Long-term stability test of elemental content in new environmental certified reference material candidates using ICP OES and ICP-SFMS

Toxin Reviews ◽

10.1080/15569543.2019.1617315 ◽

2019 ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Abubakr M. Idris ◽

Ahmed O. Alnajjar ◽

Turki S. Alkhuraiji ◽

Khaled F. Fawy

Keyword(s):

Reference Material ◽

Certified Reference Material ◽

Stability Test ◽

Elemental Content ◽

Icp Oes ◽

Term Stability ◽

Long Term Stability

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Long-term stability of hydrocarbons in NIST gas standard reference material (SRM) 1800

Analytical and Bioanalytical Chemistry ◽

10.1007/s00216-005-3381-3 ◽

2005 ◽

Vol 383 (1) ◽

pp. 98-106 ◽

Cited By ~ 11

Author(s):

George C. Rhoderick

Keyword(s):

Reference Material ◽

Standard Reference Material ◽

Term Stability ◽

Long Term Stability ◽

Gas Standard

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Multi-Center Calibration of the Third BCR Reference Material for Thromboplastin, Rabbit, Plain, Coded CRM 149S

Thrombosis and Haemostasis ◽

10.1055/s-0038-1649966 ◽

1995 ◽

Vol 74 (06) ◽

pp. 1465-1467 ◽

Cited By ~ 4

Author(s):

A M H P van den Besselaar

Keyword(s):

Reference Material ◽

Collaborative Study ◽

Sensitivity Index ◽

Term Stability ◽

Long Term Stability ◽

Reference Preparation ◽

The Mean ◽

The Relationship ◽

International Sensitivity Index

SummaryIn a collaborative study by eleven laboratories performed within the framework of the European Community Bureau of Reference (BCR), a third reference material for thromboplastin, rabbit, plain, has been calibrated against RBT/90, the current WHO international reference preparation for thromboplastin, rabbit, plain. This third reference material (coded CRM 149S) has a mean International Sensitivity Index (ISI)of 1.257 with a standard error of the mean of 0.013.The previous BCR reference material for thromboplastin, rabbit, plain (coded CRM 149R) and the reference material for thromboplastin, bovine, combined (coded OBT/79) were also included in the trial for assessment of the long-term stability of the ISI values. The relationship between ISI values determined in the present study was nearly identical to that of the historical values. These results offer reassurance with regard to the long-term stability of these reference materials.

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