Direct and Sequential Determination of Six Metal Elements in Cooking Wine by HR-CS GFAAS

2014 ◽  
Vol 1033-1034 ◽  
pp. 658-662 ◽  
Author(s):  
An Hui Chen ◽  
Shang Long Chen ◽  
Yong Hua Wu ◽  
Ying Shao ◽  
Chuan Li Zhang
Keyword(s):  
Microwave Digestion ◽  
Correlation Coefficients ◽  
Scientific Basis ◽  
Continuum Source ◽  
Food Industries ◽  
Metal Elements ◽  
Significant Difference ◽  
Varied Form ◽  
Pre Treatment

The aim of this work was to develop a sensitive, simple and direct procedure for the determination of Cu, Cd, Cr, Pb, Mn and Al in the cooking wine by HR-CS GFAAS with a minimum sample pre-treatment. The analyses of the six metal elements were conducted using a high resolution continuum source atomic absorption spectrometer. The cooking wine as sample was just diluted in ultrapure water with 1.0% (v/v) HNO3and the analytical lines of the six metal elements were selected scientifically. The correlation coefficients better than 0.99 were obtained and the limits of detection were 0.86, 0.08, 0.28, 0.81, 0.61 and 1.54 μg/L for Cu, Cd, Cr, Pb, Mn and Al, respectively. Recoveries varied form 96.1% to 105.7%. The proposed method was applied to the determination of the six metal elements in the cooking wine and the results showed that the mass concentrations of Cu, Cd, Cr, Pb, Mn and Al were 2.10, 0.177, 7.98, 1.86, 22.3 and 217.2 μg/L, respectively. There was a good agreement between the proposed method and the microwave digestion-HR-CS GFAAS method, and F-test and t-test at 95% of confidence had no significant difference. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for quality control in food industries.

scholarly journals Study on the Distribution Characteristics and Influencing Factors of Homocysteine in the Physical Examination Population

2021 ◽  
Author(s):  
Fang Bao ◽  
Ming Cui ◽  
Xiuying Shi ◽  
Shaoqing Ju ◽  
Hui Cong
Keyword(s):  
Blood Pressure ◽  
Physical Examination ◽  
Large Scale ◽  
Kidney Injury ◽  
Scientific Basis ◽  
Cerebrovascular Diseases ◽  
Health Examination ◽  
Significant Difference ◽  
The Difference

Abstract Background: Homocysteine (Hcy) is considered to be an independent risk factor for cardiovascular and cerebrovascular diseases. No study has evaluated the distribution of Hcy on a large-scale health examination. Accordingly, this study aimed to investigate the level and distribution of Hcy in the healthy physical examination population and the correlation with other biomarkers, and analyzed for cardiovascular and other diseases. The prevention provides an important scientific basis.Methods: From February 2017 to April 2020, 8063 medical examination populations were selected for analysis. Determination of serum Hcy, TC, TG, LDL-c, HDL-c, ALT, ALP, γ-GT, TBIL, GLU, urea, Cr, UA and related metabolic risk factors. According to the multivariate regression model of age, gender, smoking, drinking, body mass index (BMI), systolic blood pressure (SBP) and diastolic blood pressure (DBP), the relationship between Hcy and other biochemical indicators was evaluated. Results: Among 8063 cases, the age, BMI, SBP and DBP of the high-Hcy group were higher than those of the low-Hcy group, the difference was statistically significant (P<0.05), and the proportion of males, smoking and drinking were higher than the low In the Hcy group, the difference was statistically significant (P<0.05); the ALT, ALP, γ-GT, TBIL, Urea, Cr, UA, and TG in the high Hcy group were higher than those in the low Hcy group, and the difference was statistically significant (P<0.05 ); HDL-c in the high-Hcy group was lower than that in the low-Hcy group, and the difference was statistically significant (P<0.05). There was no statistically significant difference in TC, LDL-c, and GLU between the high- and low-Hcy groups (P>0.05). In multivariate analysis, lnHDL-C was negatively correlated with lnHcy (β=-0.038, SE=0.016, P<0.05), lnCr was positively correlated with lnHcy (β=0.055, SE=0.016, P<0.05), lnUA and lnHcy were positive correlation (β=0.043, SE=0.019, P<0.05). Conclusion: Hcy is closely related to HDL-c, Cr and UA, which indicates that Hcy may affect the metabolism of HDL-c and UA, and can also be used as an auxiliary diagnostic index for kidney injury.

scholarly journals Accuracy of two hand-held electronic devices for determination of blood β-hydroxybutyrate in dairy cows

2017 ◽  
Vol 18 (3) ◽  
pp. 439-445 ◽  
Author(s):  
Eliana FIORENTIN ◽  
Anderson TIECHER ◽  
Cristina MENEGAT ◽  
Clarice SOARES ◽  
Adelina AIRES ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Standard Method ◽  
Electronic Devices ◽  
Correlation Coefficients ◽  
Standard Technique ◽  
Portable Devices ◽  
Predictive Values ◽  
Subclinical Ketosis ◽  
Significant Difference

SUMMARY The cowside determination of blood β-hydroxybutyrate (BHB) is an important tool for diagnosing subclinical ketosis in dairy cattle. Portable methods to measure BHB have been introduced in the past years. This study evaluated the accuracy of two hand-held electronic devices for blood determination of BHB in dairy cows at early postpartum. A total of 98 blood samples were collected from dairy cows in the first month of lactation and tested with FreeStyle Optium (FSO, Abbott) and KetoVet (KVE, TaiDoc) portable devices according to the manufacturer instructions. Spectrophotometric BHB analysis (Ranbut, Randox) was used as standard method. The incidence of subclinical ketosis was 37.7 % determined by the standard method, 40.8 % determined by the FSO system and 42.8 % detected with the KVE system. The sensitivity and specificity indexes were 88.1% and 98.4% for FSO and 78.7% and 92.4% for KVE, respectively. The Pearson´s correlation coefficients comparing the portable devices to the standard technique were 0.96 for FSO and 0.93 for KVE. No significant difference in BHB values was found between the two portable tests and the standard method. Predictive values (PV) were better using FSO (positive PV 97.3 %, negative PV 92.4%) than using KVE (positive PV 88.1 %, negative PV 85.9 %). Passing-Bablok regressions revealed good agreement between methods. Though FSO system had a better performance than KVE system, the results suggest that the two portable systems have good accuracy and are reliable for measuring BHB.

scholarly journals Determination of titanium dioxide in cement by Microwave Digestion-VIS Spectrophotometry

2021 ◽  
Vol 236 ◽  
pp. 02038
Author(s):  
Zheng-gen Huang ◽  
Tao Wang ◽  
Xiao-bin Li ◽  
Bei-jia Li
Keyword(s):  
Titanium Dioxide ◽  
Microwave Digestion ◽  
New Method ◽  
National Standard ◽  
Standard Reference Materials ◽  
Significant Difference ◽  
Student’S T ◽  
Working Parameters ◽  
Certified Values

A new method to determine titanium dioxide in cement by Microwave Digestion-DAPM VIS Spectrophotometry which has many advantages such as simple operation, safe and fast, dissolve completely is presented in this paper. The determination conditions and working parameters of the microwave digestion instrument including the species and dosage of digestion reagent, wavelength, reaction time and the dosage of DAPM were optimized. The results show that samples were dissolved by HNO3-HF-H2O2, 395nm as the wavelength and 12mL of DAPM. The method has been validated by determination of titanium dioxide in national standard reference materials of GBW03201, GBW03201c, GBW03207 and GBW03205. The results were in agreement with certified values and the RSD was 1.07%-4.52%. The recovery ratio was ranging from 91.8% to 108.0% and the ｜△lgC｜was less than 0.018. Comparison with the traditional digestion method that analytical cement samples of Sichuan, there is no significant difference between the two methods by Student's t test. This new method provide a new way for quick and accurate to determine the content of titanium dioxide in cement.

Determination of Calcium in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Resolution Continuum Source Flame Atomic Absorption Spectrometry

2014 ◽  
Vol 1010-1012 ◽  
pp. 417-421
Author(s):  
Chao Li ◽  
Shang Long Chen
Keyword(s):  
High Resolution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Comparative Method ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Significant Difference

The aim of this work was to evaluate the microemulsification after incomplete digestion as sample preparation procedure for determination of Ca in leisure foods by high resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). Microemulsions were prepared with digestive liquor and n-butyl alcohol as an auxiliary emulsifier after incomplete digestion treatment. The appropriate fuel flow, 70 L/h, and the optimum burner height, 5 mm, were obtained by single factor experimental design. The results showed that the correlation coefficient was better than 0.999, the characteristic concentration was 0.086 mg/L, the precision (RSD) for 6 replicate measurements of Ca was 1.7% and the average of recoveries was 102.1%. F-test and t-test (95% confidence level) in between the proposed method and the comparative method, using microwave digestion-HR-CS FAAS, had no significant difference. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for determination of metal elements in food.

scholarly journals Spectrophotometric Method for Determination of Five 1,4-Dihydropyridine Drugs Using N-Bromosuccinimide and Indigo Carmine Dye

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Mohamed A. El Hamd ◽  
Sayed M. Derayea ◽  
Osama H. Abdelmageed ◽  
Hassan F. Askal
Keyword(s):  
Spectrophotometric Method ◽  
Indigo Carmine ◽  
Correlation Coefficients ◽  
Dosage Forms ◽  
Variance Ratio ◽  
Statistical Comparison ◽  
Significant Difference ◽  
Beer’S Law ◽  
Indigo Carmine Dye

Indirect spectrophotometric method is described for quantification of five of 1,4-dihydropyridine (1,4-DHP) drugs using N-bromosuccinimide (NBS) with the aid of indigo carmine (INC) dye. The method is based on addition of known excess of NBS to an acidified solution of 1,4-DHP drugs and determining the residual of NBS through its ability to bleach the colour of the used dye; the amount of NBS that reacted corresponded to the amount of drugs. Beer’s law is obeyed in the concentration range 1.25–13.00 μg/mL. Good correlation coefficients (0.998-0.999) were found between the absorbance values and the corresponding concentrations. Limits of detections ranged from 0.141 to 0.500 μg/mL. The proposed method was successfully applied to the analysis of dosage forms; percent of recoveries ranged from 97.31 to 99.46% without interference from any common excipients. The statistical comparison by Student’s t-test and variance ratio F-test showed no significant difference between the proposed and official or reported methods.

scholarly journals Organoleptic evaluation of cherry fruits by pre-treatment with polysaccharide compositions

2020 ◽  
Vol 23 (9) ◽  
pp. 12-20
Author(s):  
Olena Vasylyshуna
Keyword(s):  
Salicylic Acid ◽  
Sodium Alginate ◽  
Light Transmittance ◽  
Organoleptic Evaluation ◽  
Organoleptic Characteristics ◽  
Significant Difference ◽  
Before And After ◽  
Pre Treatment ◽  
Storage Technologies

Cherry fruits have a short shelf life due to the period of their storage. Therefore, to extend it, a search for new storage technologies is underway. The purpose of the research carried out during 2016-2019 at the experimental pomology station named after L.P. Simirenko IS NAAN, was the determination of the organoleptic and physical characteristics of fresh cherry fruits before and after storage when processed with polysaccharide compositions. Studies have shown that the weight of cherry varieties Zhadana, Chance, Optimist and In Memoriam Artemenko are large, their weight ranges from 5.2 to 4.8 g. The color of cherry fruits, experimental varieties, determined by the light transmittance did not indicate a significant difference within the variety. The sugar-acid index of cherry fruits prevailed in cherry fruits of Elegant and Alpha varieties, taking values above 5. Cherry fruits had a good organoleptic evaluation. Among all the experimental varieties, the fruits of the Elegant cherry variety were distinguished by their excellent tasting evaluation, appearance and gloss. According to the studied physical and organoleptic parameters and the cluster analysis, the Griot Podbelsky variety (control) was more universal. According to the group of indicators, the fruits of cherry varieties: Alpha, Optimist and Zhadana differed from Elegant and Chance. The smallest changes, compared to the control, in the fruits of cherries varieties Alpha and Optimist. After storage of cherry fruits treated with chitosan with salicylic acid compared to untreated fruits, the taste of the fruit did not deteriorate. Fruits treated with a solution of salicylic acid with chitosan or sodium alginate had an excellent tasting score. The prospect of further research is to establish the effect of polysaccharide compositions based on chitosan and sodium alginate and organoleptic characteristics of cherries of different varieties after storage.

scholarly journals Evaluation of nasal morphology in predicting vertical and sagittal maxillary skeletal discrepancies’

2014 ◽  
Vol 08 (02) ◽  
pp. 197-204 ◽  
Author(s):  
Mandava Prasad ◽  
Nellore Chaitanya ◽  
Karnati Praveen Kumar Reddy ◽  
Ashok Kumar Talapaneni ◽  
Vijaya Bhaskar Myla ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Nasal Tip ◽  
Nasolabial Angle ◽  
South Indian ◽  
Significant Difference ◽  
Skeletal Pattern ◽  
Pre Treatment ◽  
Nasal Length

ABSTRACT Objective: The purpose of this prospective observational study was to evaluate the relationship between nasal morphology and maxillary skeletal pattern. The clinical significance was to emphasize the importance of role of nasal pattern in diagnosis and treatment planning. Materials and Methods: The sample included the pre-treatment lateral cephalometric radiographs of 180 South Indian adults (94 women, 86 men), aged 18 to 28 years. Six maxillary and six nasal soft tissue parameters were measured. Pearson correlation coefficients and Analysis of variance were used for statistical analyses. Results: There were significant correlations between maxillary vertical and sagittal, skeletal and soft tissue parameters. The Mean and standard deviations were correlated between low insignificant range to high significant levels with nasal length, nasal depth and columella convexity. Nasal length also showed significant correlation with inclination of palatal plane. Significant influence of gender was seen on nasal length, nasal depth, columella convexity and nasal tip angle. A statistically significant difference was seen regarding nasal length between males and females, with nasal length being more in males (50.26 ± 4.18) than in females (48.86 ± 3.45), nasal depth being more in males (18.64 ± 2.56) than in females (16.63 ± 2.16), columella convexity being greater in males (4.31 ± 1.26) than in females (3.41 ± 1.13), nasolabial angle decreased in males (87.26° ±13.79°) than in females (89.38° ±15.72°) and nasal tip angle being more in females (80.18° ±9.44°) than in males (73.60° ±10.24°). There was no statistically significant difference in nasal hump between males (-2.01 ± 1.76) and females (-2.02 ± 1.62). Conclusion: Long nose with increased nasal prominence were seen with increase in the anteroposterior length and vertical height of maxilla. Male and female genders had a varied amount of nasal length, nasal depth and columella convexity along with nasal tip angle.

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