Validation method on sulfate determination of mortar sample from Mendut temple

2018 ◽  
Author(s):  
Thorikul Huda ◽  
Destiana Murtiyani ◽  
Iskandar Mulia Siregar ◽  
Nahar Cahyandaru
Keyword(s):  
Mortar Sample ◽  
Validation Method ◽  
Sulfate Determination

Influence of Sample Thickness and Capping on Characterization of Bedding Mortars from Historic Masonries by Double Punch Test (DPT)

2014 ◽  
Vol 624 ◽  
pp. 322-329 ◽  
Author(s):  
Enrico Sassoni ◽  
Elisa Franzoni ◽  
Claudio Mazzotti
Keyword(s):  
Compressive Strength ◽  
Poor Quality ◽  
Sample Thickness ◽  
Mortar Sample ◽  
Hydraulic Lime ◽  
Punch Test ◽  
Natural Hydraulic Lime ◽  
Wide Range ◽  
Surface Capping

For determination of compressive strength of bedding mortar used in historic masonries, a promising moderately-destructive technique is double punch test (DPT). DPT consists of loading prismatic samples of mortar (about 4×4×1 cm3) by means of two circular steel platens (typically 2 cm diameter) and then calculating mortar compressive strength as the ratio of the failure load to the cross section of the circular platens. In this study, the influence of mortar sample thickness and mortar sample capping on the reliability of results obtained by DPT was systematically investigated. The influence of sample thickness was assessed by comparing DPT results obtained for samples with 5, 10, 15 and 20 mm thickness with compressive strength determined by testing reference 4 cm-side cubes. Different mortars were considered (cement, lime-cement, natural hydraulic lime), in order to investigate a wide range of mortar mechanical characteristics. The influence of surface capping was evaluated on a lime-cement mortar by comparing compressive strength determined on reference cubes with strength obtained by DPT on proper samples, without capping and after capping with rubber, gypsum and cement. The results of the study indicate that sample thickness substantially influences mortar compressive strength determined by DPT, which may vary by up to three times depending on sample thickness. A good estimation of the actual mortar compressive strength was obtained when samples with thickness similar to the loading platens diameter were tested, which suggests that choosing the size of the loading platens for DPT based on the thickness of mortar joints under investigation may be an effective way for obtaining reliable estimations. As for the influence of surface capping, in those cases where no mortar sample regularization is possible, because of the poor quality of the mortar, the results of the study indicate that sample capping actually seems necessary in order to avoid significant underestimations of mortar compressive strength. Considering the higher practicality offered by gypsum with respect to rapid-setting cement for surface capping, the use of gypsum seems preferable.

scholarly journals Application of FT near spectroscopy for determination of true protein and casein in milk

2008 ◽  
Vol 52 (No. 9) ◽  
pp. 284-291 ◽  
Author(s):  
K. Šustová ◽  
J. Růžičková ◽  
J. Kuchtík
Keyword(s):  
Cross Validation ◽  
Reference Data ◽  
Correlation Coefficients ◽  
Nir Spectroscopy ◽  
Rapid Analysis ◽  
Validation Method ◽  
Goat’S Milk ◽  
Goat's Milk ◽  
True Protein

Our study deals with a possibility of determining true protein and casein in cow’s, ewe’s and goat’s milk and in ewe’s colostrums by FT NIR spectroscopy. Samples of milk were analysed by FT NIR in the reflectance mode with the transflectance cuvette. The values of correlation coefficients of calibration were as follows: cow’s protein 0.943; cow’s casein 0.964; ewe’s protein 0.997; ewe’s casein 0.977; goat’s protein 0.989; goat’s casein 0.890; ewe’s colostrum protein 0.983. Calibration was tested using the same set of samples by the cross validation method. The values of correlation coefficients of validation were as follows: cow’s protein 0.923; cow’s casein 0.910; ewe’s protein 0.994; ewe’s casein 0.963; goat’s protein 0.972; goat’s casein 0.814; ewe’s colostrum protein 0.871. The NIRS results were compared with reference data and no significant differences between them were found (<i>P</i> = 0.05). Results of this study indicate that FT NIR spectroscopy can be used for a rapid analysis of protein and casein in cow’s, ewe’s and goat’s milk and ewe’s colostrum.

scholarly journals Validasi Metode Penentuan Mn Dalam Oli Lubrikan Dengan Metode Pengenceran Langsung Menggunakan Spektrofotometer Serapan Atom

2019 ◽  
Vol 6 (2) ◽  
pp. 94-100
Author(s):  
Rona Maningting Napitupulu ◽  
Dirgarini Julia ◽  
Aman S. Panggabean
Keyword(s):  
Detection Limit ◽  
Limit Of Detection ◽  
Lubricating Oil ◽  
Dilution Method ◽  
Good Precision ◽  
Validation Method ◽  
Limit Of Quantitation ◽  
Environment Control ◽  
Repeatability And Reproducibility

Validation method on the determination of Mn in lubricating oil by direct dilution method using Atomic Absorption Spectrophotometer (AAS) in Laboratory & Environment Control PT. Badak NGL Bontang has been done The validation method was done with research stages such as determination of  optimum solvent, and determination of some important parameters influential for validation method such as parameter of liniearitas (r), Instrument Detection Limit (IDL), Methode Detection Limit (MDL), accuracy, precision, Limit of Detection(LOD) and Limit of Quantitation(LOQ). The result of research obtain is good, showed that the linearity value with R2 ≥ 0,997. The IDL and MDL value was 0.0021 ppm and 0.0092 ppm respectively and has been acceptability requirements of MDL. The accuracy paramater obtained recovery value with range 82.25-88.34%. The measurement of repeatability and reproducibility, the CV Horwitz value smaller than % RSD, indicating the method had a good precision. The measurement of  LOD and LOQ value was 0.095 ppm 0.317 ppm respectively. Based on the result of the research determination method of Mn in lubricating oil by direct dilution method using AAS concluded valid.

scholarly journals Validation method for determining sodium benzoate in fruit juice drinks in Malang

2019 ◽  
Vol 4 (1) ◽  
pp. 19
Author(s):  
Engrid Juni Astuti ◽  
Roha Fakhri Naufal Ilham ◽  
Januar Rahman
Keyword(s):  
Sodium Benzoate ◽  
Mobile Phase ◽  
High Performance ◽  
Glacial Acetic Acid ◽  
Fruit Juice ◽  
Hplc Method ◽  
Mobile Phase Composition ◽  
Validation Method ◽  
Accuracy And Precision

Sodium benzoate is a preservative that is permitted to be used in food and beverages. The maximum limit for using sodium benzoate in food is 600 mg/L of ingredients calculated as benzoic acid. In this study, High-Performance Liquid Chromatography (HPLC) method using a PDA detector was used for sodium benzoate levels analysis in fruit juice drink circulating in Malang. The mobile phase composition used in this study was methanol pro-HPLC:aqua pro injection (70:30) and added glacial acetic acid to reach pH 3. The analysis was conducted at a wavelength of 245 nm, and the flow rate was set at 1.00 mL/minute. This method was validated against the parameters of selectivity, linearity, accuracy, and precision, and the results obtained to meet the validation requirements. The application of the HPLC method after being validated in the determination of sodium benzoate levels in fruit juice drink circulating in Malang resulted in selectivity Rs ≥ 1.5, linearity obtained in the range 0.1-5 μg/mL with a correlation coefficient (r) = 0,9999, recovery at a concentration of 80%, 100%, and 120% was 105.31%, and precision with an RSD value of 1.40%. Based on the results, it can be concluded that the validation method of analysis shows that the method can be used to determine sodium benzoate level using HPLC with PDA detectors for routine use in fruit juice drink samples.

scholarly journals Validation of UV-VIS Spectrophotometric Methods for Determination of Inulin Levels from Lesser Yam (Dioscorea esculenta L.)

2018 ◽  
Vol 21 (4) ◽  
pp. 161-165
Author(s):  
Sandra Ayu Apriliyani ◽  
Yohanes Martono ◽  
Cucun Alep Riyanto ◽  
Mutmainah Mutmainah ◽  
Kusmita Kusmita
Keyword(s):  
Analytical Methods ◽  
Coefficient Of Determination ◽  
Recovery Test ◽  
Validation Method ◽  
Spectrophotometric Methods ◽  
Accuracy Test ◽  
Validation Of Methods ◽  
Precision Test

Validation of methods is necessary to ensure that the analytical methods used are appropriate and reliable. In this research, the determination of validation method and determination of inulin content from gembili bulb (Dioscorea esculenta L.). The method used for determining inulin levels is UV-Vis spectrophotometry. Based on the results obtained, the maximum wavelength determination of inulin levels is 520 nm. The method of analysis in this study meets the specified validation requirements. These parameters include the equation on the inulin raw curve y = 0.0045x +0.109 with the coefficient of determination 0.9992. The accuracy of the methods tested using the recovery test was 96.14-106.76% at concentrations of 25, 100, and 225 ppm. The intraday precision test is in the range of 2.67-6.82% at the same concentration as the accuracy test. Precision interday equal to 7.41% at concentration 225 ppm for 3 day analysis period. The values of LOD and LOQ are 3.58 ppm and 11.95 ppm, respectively. The concentration of inulin extract from gembili bulb is 840.44-12188.59 ppm.

Validation Method for the Determination of Sulfonamide Residues in Bovine Milk by HPLC

2007 ◽  
Vol 66 (3-4) ◽  
pp. 191-195 ◽  
Author(s):  
Yin-Liang Wu ◽  
Cun Li ◽  
Yong-Jun Liu ◽  
Jian-Zhong Shen
Keyword(s):  
Bovine Milk ◽  
Validation Method ◽  
Sulfonamide Residues
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