Validation of candidate reference methods based on ion chromatography for determination of total sodium, potassium, calcium and magnesium in serum through comparison with flame atomic emission and absorption spectrometry

Thienpont, Linda M.; Nuwenborg, Jean E. Van; Reinauer, H.; Stöckl, Dietmar

doi:10.1016/s0009-9120(96)00090-2

Cited by 34 publications

(18 citation statements)

References 18 publications

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“…Measurements of t-Mg were performed using an ion chromatography reference method (5,6). The i-Mg values were determined with an ion-selective electrode system 988-4 from AVL List (Graz, Austria) immediately after centrifugation.…”

Section: Analytical Measurementsmentioning

confidence: 99%

Differences in Serum Ionized and Total Magnesium Values During Chronic Renal Failure Between Nondiabetic and Diabetic Patients

et al. 2004

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Section: Analytical Measurementsmentioning

confidence: 99%

Differences in Serum Ionized and Total Magnesium Values During Chronic Renal Failure Between Nondiabetic and Diabetic Patients

et al. 2004

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“…The reduced number in the latter case was due to limited sample volume. Measurements by ion chromatography (2,3) were performed in batches of 9-10 samples over a period of 9 days. This measurement scheme was necessary because of the relatively long Chromatographie runs.…”

Section: Methodsmentioning

confidence: 99%

“…We therefore investigated the state-of-the-art of the accuracy and specificity of routine serum total calcium measurements. Four frequently used routine test systems for serum total calcium were evaluated, using a recently developed candidate reference method based on ion chromatography (2,3), applying split sample measurement of a panel of patient samples. The main emphasis of the study was assessment of the overall bias of the test systems and their sensitivity to common sample matrices.…”

Section: Introductionmentioning

confidence: 99%

State-of-the-Art of Serum Total Calcium Measurement as Investigated by Split-Sample Measurement with an Ion Chromatography Candidate Reference Method

Nuwenborg

Stöckl²,

Thienpont³

1997

Clinical Chemistry and Laboratory Medicine

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Summary:We evaluated bias and inaccuracy of four frequently used routine test systems for serum total calcium, using a candidate reference method based on ion chromatography. The mean biases and 95% confidence intervals that we observed were 0.0 ± 0.59% for Johnson & Johnson arsenazo(III), 1.3 ± 0.62% for Beckman arsenazo(III), -0.4 ± 0.44% for Beckman applying ion selective electrode measurement after sample dilution, and -1.9% ± 0.42% for Boehringer o-cresolphthalein. The inaccuracy of all test systems was usually < 4.7% (calculated as deviation of singlicates from ion chromatography). Both bias and inaccuracy are discussed in the light of specifications set by expert groups or derived from the biological variation of serum total calcium. The study revealed that the intrinsic quality of commonly used test systems for serum total calcium satisfies even some of the more stringent criteria for method bias and inaccuracy.

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“…A few recent application publications are mentioned. Thienpont et al (1996) report on the validation of candidate reference methods based on ion chromatography for determination of total sodium, potassium, calcium and magnesium in serum through comparison with flame atomic emission and absorption spectrometry. The International Measurement Evaluation Programme (IMEP) owned and operated by the Institute for Reference Materials and Measurements (IRMM), is one of the few interlaboratory comparison programs to evaluate measurement performance against certified "reference values".…”

Section: Data Quality Assurancementioning

confidence: 99%

Analytical Chemistry of Element Determination (Non‐Nuclear and Nuclear)

Ihnat¹

2004

Elements and Their Compounds in the Environment

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Validation of candidate reference methods based on ion chromatography for determination of total sodium, potassium, calcium and magnesium in serum through comparison with flame atomic emission and absorption spectrometry

Cited by 34 publications

References 18 publications

Differences in Serum Ionized and Total Magnesium Values During Chronic Renal Failure Between Nondiabetic and Diabetic Patients

Differences in Serum Ionized and Total Magnesium Values During Chronic Renal Failure Between Nondiabetic and Diabetic Patients

State-of-the-Art of Serum Total Calcium Measurement as Investigated by Split-Sample Measurement with an Ion Chromatography Candidate Reference Method

Analytical Chemistry of Element Determination (Non‐Nuclear and Nuclear)

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