Characterization of a certified reference material (NMIJ CRM 8301-a) for determination of Cu in bio-ethanol

Zhu, Yanbei; Narukawa, Tomohiro; Numata, Masahiko; Kitamaki, Yuko; Matsuo, Mayumi; Hioki, Akiharu; Kato, Kenji; Chiba, Koichi

doi:10.1016/j.fuel.2012.06.093

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Typical relative standard deviations were 2.1, 2.0, 1.7, 1.1, 2.5, and 2.5% for Na, Mg, K, Ca, P, and S, respectively. 21 The DL of Ca obtained in the present work was lower than 1/100 of that obtained using an ICP-MS with a dynamic reaction cell, 17 in which xylene dilution was also applied. These analytical figures of merits ensured that the relative uncertainty due to the BEC and the DL was less than 0.1% for measuring the present samples, which permitted reliable measurements for homogeneity assessment with target values of the relative uncertainty of under 3%.…”

Section: Discussioncontrasting

confidence: 57%

Simultaneous Direct Determinations of Na, Mg, K, Ca, P, and S in Biodiesel Fuel by ICP-QMS/QMS after Xylene Dilution: Development and Application of a High-throughput Method for a Homogeneity Assessment of a Candidate Reference Material

2017

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Technology (AIST), is providing chemical and physical metrology service to the world, including the development and providing of CRMs for the analysis of fuels based on a managing system in accordance to the ISO Guide 34:2009. 2 Up to date, the NMIJ has issued RMs and CRMs of sulfur calibrating solutions (NMIJ CRMs 4215-a, 4217-a, 4221-a, NMIJ RM 4216-a) and bioethanol (NMIJ CRM 8301-a) for the analysis of fuels.3 In accordance to the development plan of CRMs for fuel analysis, a CRM for the measurements of water, methanol, density, kinematic viscosity, and regulated elements (Na, Mg, K, Ca, P, and S) was developed by the present authors' group following ISO Guide 35:2006, 4 which is an international technical guide for the development of RMs and CRMs covering general and statistical principles for certification, e.g. the production of candidate RMs, assessments of the homogeneity, stability study, and characterization.Homogeneity is one of the basic requirements for candidate materials of CRM, and the uncertainty of the homogeneity should be studied and combined to obtain the uncertainty of a certified value. 4 According to the ISO Guide 35:2006, 4 "The minimum number of bottles selected at random is between 10 and 30, but should generally not be smaller than 10". Furthermore, at least 3 sub-samples were taken for each bottle to check the reproducibility of the sample pretreatment. Therefore, measurements of over 30 sub-samples are required for a homogeneity assessment of a candidate RM. High throughput and reliable sample pretreatment methods are preferred for such kind of chemical analysis to lower the cost and to improve the working efficiency.The concentrations of Na, Mg, K, Ca, P, and S in biodiesel fuel (BDF) are regulated so as to ensure the engine performance and for environmental conservation.5 As a result, measurements of these elements are required for quality monitoring of the BDF. In responding to this requirement, certifications of the elements' contents were covered by the present candidate RM. In our previous work on the development of CRMs, Na, Mg, K, Ca, and P, were often measured by an inductively coupled plasma optical emission spectrometer (ICP-OES) and an atomic emission spectrometer (AES), 6-8 while S was measured using a total sulfur analyzer attached with a trap and release unit. 9-11 In these methods, the measurement was often carried out at specific 2017 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. E-mail: yb-zhu@aist.go.jp Inductively coupled plasma tandem quadrupole mass spectrometry (ICP-QMS/QMS) measurements after xylene dilution were investigated as a method for determining the elements (Na, Mg, K, Ca, P, and S) in a biodiesel fuel (BDF) candidate reference material (RM). Optimizations were respectively carried out for the following parameters to obtain the best performance for measurements: O2 flow rate (additional gas to the carrier gas) to ensure complete combustion of the xylene solvent in the plasma, plasma power to obtain ...

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Section: Discussioncontrasting

confidence: 57%

Simultaneous Direct Determinations of Na, Mg, K, Ca, P, and S in Biodiesel Fuel by ICP-QMS/QMS after Xylene Dilution: Development and Application of a High-throughput Method for a Homogeneity Assessment of a Candidate Reference Material

2017

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“…Certified components are water 11) , methanol, sulfur and copper 12) which are regulated by JIS K 2190 1) . Certified values are 1688 26 mg kg -1 for water 11) , 482 23 mg kg -1 for methanol, 2.43 0.23 mg kg -1 for sulfur, and 0.0537 0.0041 mg kg -1 for copper 12) , where plus or minus values are the expanded uncertainty. To determine the sulfur certified value, combustion ultraviolet fluorescence and combustion ion chromatography analysis were used.…”

Section: Discussionmentioning

confidence: 99%

Determination of Sulfur in Bioethanol Certified Reference Material

Kitamaki

Zhu

Inagaki

et al. 2013

J. Jpn. Petrol. Inst.

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A bioethanol certified reference material (CRM), NMIJ CRM 8301-a, has been issued by the National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ, AIST). The raw material for this CRM is fermented bioethanol made from rice. Certified values have been provided for the contents of water, methanol, sulfur and copper. This CRM can be used for calibration and validation of water, methanol, sulfur and copper analysis in bioethanol fuel and similar matrices. This paper describes the methods for the determination of the certified value of sulfur for CRM 8301-a. The certified value was determined by analysis of the sample candidate reference material subdivided in ampoules. The measurement of sulfur in the candidate reference material was performed using combustion ultraviolet fluorescence detection and combustion ion chromatography detection. The certified sulfur value is 2.43 mg kg -1 and the expanded uncertainty (k 2) is 0.23 mg kg -1 .

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“…The development of suitable certied reference materials is a requisite for method validation for any sample type. During this review period, Zhu et al 84 reported the development of a material certied for Cu in bio-ethanol (NMIJ CRM 8301-a). The material was made from rice fermentation and was mixed with copper acetate and acetic acid.…”

Section: Fuels and Lubricantsmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

Carter

Clough

Fisher

et al. 2020

J. Anal. At. Spectrom.

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Characterization of a certified reference material (NMIJ CRM 8301-a) for determination of Cu in bio-ethanol

Cited by 6 publications

References 19 publications

Simultaneous Direct Determinations of Na, Mg, K, Ca, P, and S in Biodiesel Fuel by ICP-QMS/QMS after Xylene Dilution: Development and Application of a High-throughput Method for a Homogeneity Assessment of a Candidate Reference Material

Simultaneous Direct Determinations of Na, Mg, K, Ca, P, and S in Biodiesel Fuel by ICP-QMS/QMS after Xylene Dilution: Development and Application of a High-throughput Method for a Homogeneity Assessment of a Candidate Reference Material

Determination of Sulfur in Bioethanol Certified Reference Material

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

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