The Influence of Chlorine on the Determination of Combined Water: An Investigation of a Correction Procedure

Li, Ji-le; Liu, Wenzhang

doi:10.1111/j.1751-908x.1998.tb00694.x

Cited by 2 publications

(2 citation statements)

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“…For example, when the major components were measured, air dried samples were specified and a correction for H 2 O had to be made at the same time (samples were dried at a temperature of 110 °C for four hours). When H 2 O + was determined by the Penfield method (Li and Liu 1998), the result had to be corrected for C1 due to the high salt content of the samples. The certified reference material GBW07315 (GSMS-2) was used as the monitor sample and to demonstrate traceability.…”

Section: Multi-laboratory Cooperative Analysismentioning

confidence: 99%

Preparation of Five China Sea and Continental Shelf Sediment Reference Materials (MSCS‐1–5) with Ultra‐Fine Particle Size Distributions

Wang¹,

Wang²,

Gao³

et al. 2009

Geostandard Geoanalytic Res

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We report the preparation and characterisation of five sediment reference materials MSCS‐1–5 from the China Sea and continental shelf. The raw samples were individually collected from the East China Sea and the South China Sea. They were first ground by ball mill to a homogenous powder of ‐200 mesh (< 74 μm). Then, half of each sample was further processed by an ultra‐fine powder processing technique, a jet mill, to form a powder with an average particle size of < 4 μm (about 800 mesh). The homogeneity was tested by high‐precision WD‐XRF and the precision was found to be less than 1% RSD, which is compatible with the precision range for modern analytical techniques. An F‐test showed that all five samples were homogeneous. Twelve laboratories participated in the cooperative study and sixty constituents were determined. Between fifty and fifty‐two analytes were characterised as recommended values in MSCS‐1–5 in compliance with Chinese national norms. The sum of the major and minor elements or components in the five reference materials MSCS‐1–5 was 99.91%, 99.86%, 100.43%, 100.12% and 99.66%, respectively.

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Section: Multi-laboratory Cooperative Analysismentioning

confidence: 99%

Preparation of Five China Sea and Continental Shelf Sediment Reference Materials (MSCS‐1–5) with Ultra‐Fine Particle Size Distributions

Wang¹,

Wang²,

Gao³

et al. 2009

Geostandard Geoanalytic Res

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show abstract

“…In addition, a multi-laboratory collaborative analy sis procedure was formulated, with which laboratories were required to comply. Laboratories were required to dry samples at a temperature of 110 °C and specific details were given for the determination of H 2 O and H 2 O + (Wang et al 1998a, Li andLiu 1998).…”

Section: Collaborative Analysismentioning

confidence: 99%

Three Cobalt‐Rich Seamount Crust Reference Materials: GSMC‐1 to 3

Wang¹,

Gao²,

Wang³

et al. 2003

Geostandards Newsletter

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A research project involving the preparation of three Co‐rich crust reference materials (GSMC‐1 to 3) has been preliminarily completed. The samples were collected from the eastern and central Pacific seamount zones and their main chemical composition is MnO2. After the raw materials were dried in ambient air and at low temperature (60‐100 C), they were ground in a ball mill to form a well‐mixed powder. The proportion of particle size fractions of < 74 μm and < 3 μm was over 98% and 50% respectively. The homogeneity of the materials was tested using wavelength dispersive X‐ray fluorescence spectrometry (WD‐XRF). The relative standard deviation (% RSD) of the measurements for all the selected elements in forty sub‐samples randomly taken from the bottles was less than 0.4%. Sixteen laboratories from Germany, Russia, France, Australia and China participated in the collaborative analysis programme. Fifty seven elements or constituents were analysed, and among those, forty six elements were certified in each sample. The sum of contents of the major and minor elements or components was 99.5% for GSMC‐1, 99.6% for GSMC‐2 and 99.2% for GSMC‐3.

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The Influence of Chlorine on the Determination of Combined Water: An Investigation of a Correction Procedure

Cited by 2 publications

References 0 publications

Preparation of Five China Sea and Continental Shelf Sediment Reference Materials (MSCS‐1–5) with Ultra‐Fine Particle Size Distributions

Preparation of Five China Sea and Continental Shelf Sediment Reference Materials (MSCS‐1–5) with Ultra‐Fine Particle Size Distributions

Three Cobalt‐Rich Seamount Crust Reference Materials: GSMC‐1 to 3

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