Tao L.,State Key Laboratory of Ceramic |
Xiang H.,State Key Laboratory of Ceramic |
Xu H.,State Key Laboratory of Ceramic |
Sun J.,State Key Laboratory of Ceramic |
And 3 more authors.
Accreditation and Quality Assurance | Year: 2010
The proficiency-testing scheme (CNCA-07-06) concerning lead and cadmium determination extracted from glazed ceramic surfaces involved 43 Chinese laboratories as participants, and has been well implemented. All the test materials passed the statistical homogeneity tests, and were deemed suitable for distribution. Reference values were determined from the obtained results and the performance of participants was based on z-scores. As a result, the majority of participants obtained satisfactory z-scores and laboratories that need to revise their procedures were singled out. Overall, about 8.5% of all results submitted in this PT round were unsatisfactory in terms of z-scores (22 out of 258 total data sets submitted), while the percentage of doubtful z-scores was 4.6% (12 out of 258 total data sets). Besides, the factors that might be associated with unsatisfactory results were also evaluated and suggestions were made to help improve the performance of laboratories in this PT. © Springer-Verlag 2009.
Wang L.,State Key Laboratory of Ceramic |
Bian W.-W.,Weifang Medical University |
Zhu L.,State Key Laboratory of Ceramic |
Ni R.-J.,State Key Laboratory of Ceramic |
Tao L.,State Key Laboratory of Ceramic
Jiegou Huaxue | Year: 2011
The title complex bis(2-acetylpyridine thiosemicarbazonato)-indium(iii) perchlorate hydrate has been synthesized by the reaction of 2-acetylpyridine thiosemicarbazide (L) with indium(iii) perchlorate, and its structure was characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal of the title compound ([In(C8H9N 4S)4]ClO4H2O) belongs to monoclinic, space group P21/c with a = 12.6438(18), b = 12.6259(18), c = 15.116(2) nm, β = 105.800(2)°, Z = 4, V = 2321.9(6) nm3, Mr = 618.79, Dc = 1.770 g/cm3, μ = 1.359 mm-1, F(000) = 1240, R = 0.0265 and wR = 0.0675. X-ray analysis indicates that various intriguing hydrogen patterns involving both the solvent intermedia and polyatomic counterions play crucial roles in the self-assembly of functional supramolecules.
Bian W.,Weifang Medical University |
Zhang N.,Huangshan University |
Wang L.,State Key Laboratory of Ceramic
Analytical Sciences | Year: 2010
The measurement of total bilirubin in serum is one of the most frequently performed tests in clinical analysis. A new spectrofluorometric method was developed for the determination of trace amounts of total bilirubin. Using tetracycline-Eu3+ as a fluorescent probe, bilirubin can remarkably reduce the fluorescence intensity of the tetracycline-Eu3+ complex, and the reduced fluorescence intensity of Eu3+ ion is in proportion to the concentration of bilirubin. The optimum conditions for the determination of bilirubin were also investigated. This method is simple, practical, and relatively free of interference from coexisting substances. It can be successfully applied to assess total bilirubin in serum samples. We also compared the developed method with a modified Jendrassik-Grof method in clinical analysis. 2010 © The Japan Society for Analytical Chemistry.