Evaluation of the Nucleated Red Blood Cells Count of Sysmex XN-9000 Automatic Hematology Analyzer and the Validation of Manual Method / 现代检验医学杂志

Objective To evaluate the nucleated red blood cell (NRBC)count of Sysmex XN-9000 automatic hematology anal-ysis lines comparing with manual method,and verify the accuracy of the analyzer results.Methods 60 blood samples with more than 1% of NRBCs detected by XN-9000 were counted NRBCs by traditional manual microscopy in blood smears,and verified the analyzer results.Results According to the reliability analysis,the results of total 60 samples were all within the range of the reliability;correlation analysis showed that correlation coefficient (r)of group NRBC (%)1~10 and>10 were 0.972 1 and 0.996 2,respectively.There were no significant differences between them (P>0.05).Conclusion Compared with manual method,the results of NRBC count of XN-9000 were within the range of reliability,and showed good correla-tion.The analyzer test results of NRBC were accurate and reliable and could be applied to the detection of clinical samples.

Development and validation of a method for the determination of folic acid in different pharmaceutical formulations using derivative spectrophotometry

ABSTRACT Folic acid is a B complex water-soluble vitamin that is essential to humans, and its deficiency can cause problems including congenital malformations in the fetus as well as heart disease. Most countries affected by diseases associated with a lack of folic acid now supplement foods with the vitamin. There is therefore a need for the development of new analytical procedures able to determine folic acid present in different matrices. This work describes the development of zero order and first order derivative spectrophotometric methods for the determination of folic acid in different pharmaceutical formulations, using 0.1 mol L-1 NaOH as solvent. The methods are shown to be simple, selective, and robust. Good linearity was achieved, with correction coefficients ≥0.9996 and limits of detection and quantification ranging from 0.64 to 0.75 and from 1.80 to 2.85 mg L-1, respectively. Recoveries of 98-104% were obtained in accuracy tests, and precision (as RSD) was between 0.2 and 4.8%. The methods can be used in routine analyses for quality control purposes, offering an alternative to the procedures already reported in the literature

Simultaneous determination of abamectin homologs H 2 B 1a and H 2 B 1b in gel formulation by high performance liquid chromatography

ABSTRACT Abamectin is a drug with antiparasitic properties used in several pharmaceutical formulations. The objective of this research was to develop and validate a high performance liquid chromatographic (HPLC) method for quantification of the two abamectin homologs (H2B1a and H2B1b) in gel formulation. This HPLC method was validated using a LichroCart(r) 100 RP-18 (125 x 4 mm, 5 µm) column. The mobile phase contained of acetonitrile and water (95:5 v/v) with 1% acetic acid. The flow rate was 1.0 mL min-1 and UV detection was performed at 245 nm. Mobile phase solutions were prepared containing a nominal concentration 185.2 µg mL-1 H2B1a and 9.6 µg mL-1 H2B1b. The method displayed good linearity in the concentration range of 148.1 - 222.3 µg mL-1 and 7.7 - 11.5 µg mL-1, for H2B1a and H2B1b, respectively, with a correlation coefficient of (r)> 0.99 for both compounds, calculated by the least mean squares method. Detection limits (DLs) were 2.8 µg mL-1 and 1.2 µg mL-1 and quantitation limits (QLs) were 8.6 µg mL-1 and 3.8 µg mL-1, for H2B1a and H2B1b, respectively. The method is simple, economical and efficient for the quantitative determination of abamectin H2B1a and H2B1b homologs in pharmaceutical preparations.

Spectrophotometric validation method of dexchlorpheniramine maleat and betamethasone.

This paper have a purpose to determine the condition of analysis of betamethasone and dexchlorpheniramine maleat on tablet using ultraviolet spectrophotometry and high perfomance liquid chromatography (HPLC) methods. The spectrophotometry method used phosphate buffer pH 7,2 as the solvent, whereas the HPLC method used HPLC, LC-10AT VP, Shimadzu;μ BondapakTM C18 10μm 125Å, 4,6 x 150 mm coloumn Waters (Irlandia); methanol buffer (45:55) pH 7,2 as mobile phase; ultraviolet detection 240 nm; flow rate 1 mL/menit. Result showed that the correlation coefficient of spectrophotometry were 0,9998 and 0,9997 for dexchlorpheniramine maleat dan betamethasone at wavelength 239 and 262. The LOD for spectrophotometry were 2,261 ppm for dexchlorpheniramine maleat at λ 239 ; 0,707 ppm for dexchlorpheniramine maleat at λ 262 ; 0,088 ppm for betamethasone at λ 239 ; dan 0,127 for betamethasone at λ 262, the LOQ were 7,536 ppm for dexchlorpheniramine maleat at λ 239 ; 2,357 ppm for dexchlorpheniramine maleat at λ 262 ; 0,295 for betamethasone at λ 239 ; dan 0,425 for betamethasone at λ 262. The recovery percentation of the spectrophotometry methods for dexchlorpheniramine maleat and betamethasone were 101,32% and 100,77%. The recovery percentation of the HPLC methods for dexchlorpheniramine maleat and betamethasone were 107,6% and 100,8%. Coefficient of variance of the spectrophotometry methods methods for dexchlorpheniramine maleat and betamethasone were 1,413 % and 0,466 %, coeffisien of variance of the robustness test of the spectrophotometry methods for dexchlorpheniramine maleat and betamethasone were 0,834 % and 1,140 %. Based on this research has been found that the the analysis method of spectrophotometry was eligible for the validation parameter value. These data may be applied in Pharmaceutical industries.

Fast and simple multi-element determination of essential and toxic metals in whole blood with quadrupole ICP-MS.

The development of reliable and sensitive methods for elements quantification in low-level concentration is a necessary requirement to detect increases or deficiencies considered unusual in human body. In this sense the sensitivity and selectivity of mass spectrometric methods are particularly appropriate to deal with this issue since many elements in biological material are at extremely low concentration levels and necessity to be monitored. Simultaneous determination of Be, Bi, Ba, Pb, Pd, Pt, Rh, Ni, V, Cr, Mn, As, Cd, Mo, Co, Hg, Tl, Sr, Sb, Se, Cu and Zn in whole blood by ICP-MS is described. Sample preparation consisted of a simple dilution (twenty-fold) with 0.05% Triton X-100 in 0.2% HNO3. The method proved to be accurate (accuracy ranged from 88.9% to 108%), precise (CV was below 5% for all elements) and sensitive (LOQ were below 1 μg L-1 for most of the studied elements). Use of DRC was only necessary for chromium and vanadium determination in blood. The proposed method uses low quantities of blood and this feature is essential when analyzes involve human biological samples. The obtained results show the applicability of the developed methodology for the rapid, sensitive and simultaneous determination of inorganic constituents in whole blood.