Cheese - Guidance on sample preparation for physical and chemical testing

2021 ◽  
Keyword(s):  
Sample Preparation ◽  
Physical And Chemical ◽  
Chemical Testing

Physical And Chemical Testing Of Compounded PVC

2011 ◽  
Vol 1 (5) ◽  
pp. 95-96
Author(s):  
Sapna Dabade ◽  
◽  
Dr. Dheeraj Mandloi ◽  
Deepak Khare
Keyword(s):  
Physical And Chemical ◽  
Chemical Testing

The Use of Metallography for Examination of Causes of Surface Defects on Visual Parts

2017 ◽  
Vol 270 ◽  
pp. 107-111
Author(s):  
Zuzana Andršová ◽  
Pavel Kejzlar
Keyword(s):  
Sample Preparation ◽  
Cross Section ◽  
Surface Defects ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Visual Appearance ◽  
Visual Defects ◽  
Physical And Chemical ◽  
Microscopic Techniques ◽  
And Chemical Properties

Many of currently manufactured components intended for automotive, must not only meet the requirements on functionality, but also considerable demands on the visual appearance. Parts are subjected to thorough inspection and suppliers are forced to deal with causes of a very slight visual defects. When examining the defects, it is necessary to use a whole range of advanced analytical methods and procedures previously used only for identification of the physical and chemical properties and structure of the material. This paper deals with several examples which have been solved. It focuses especially on the use of demanding metallographic sample preparation from components with surface defects, examining the defects on the cross-section using mainly microscopic techniques and determining the causes of their generation. These results then serve as a basis for modification of the technology and thus they are the tool for significant reduction of amount of NOK parts.

Evaluation of the Potential of Waste from Pulp Production (Grits) in its Use in Mortar: Physical and Chemical Characterization

2015 ◽  
Vol 820 ◽  
pp. 583-587
Author(s):  
Leonardo Carvalho Mesquita ◽  
Rita de Cássia S. Sant’ana Alvarenga ◽  
Carol Ferreira Rezende Santos ◽  
Adonys Natan Oliveira Alvares ◽  
Ana Augusta Passos Rezende ◽  
...  
Keyword(s):  
Paper Industry ◽  
Chemical Characterization ◽  
Pulp And Paper Industry ◽  
Kraft Process ◽  
Physical And Chemical Characterization ◽  
Absorption Determination ◽  
Potential Alternative ◽  
Physical And Chemical ◽  
Chemical Testing

The grits is an inorganic solid residue generated during the Kraft process by the pulp and paper industry, which presents in its composition the main ingredients of Portland cement. According to some authors, the grits can be classified as a non inert, non hazardous, granular solid industrial waste. With this in mind, a study was proposed with the objective of evaluating, initially, the applicability of grits in mortar, by means of physical and chemical testing. The physical evaluations were realized through the following tests: determination of bulk gravity saturated - surface - dry (SSD) and water absorption; determination of the pulverulent material content; and the determination of particle size distribution. To chemically test the grits, a reading of the metal concentrations present in the grits was realized as well as an analysis of the leaching and solubilization extracts. It was concluded that the addition of grits to mortar is a potential alternative.

scholarly journals Determination of zinc by atomic absorption in automobile tire rubber as a source of ecotoxicants in atmospheric air

2021 ◽  
Vol 2131 (3) ◽  
pp. 032059
Author(s):  
A A Fedoseenko
Keyword(s):  
Comparative Analysis ◽  
Sample Preparation ◽  
Atomic Absorption ◽  
Motor Vehicle ◽  
Zinc Content ◽  
Optimal Sampling ◽  
Atmospheric Air ◽  
Automobile Tire ◽  
Pre Treatment ◽  
Physical And Chemical

Abstract Annotation. A methodology for determining zinc in tires (as a source of ecotoxicants in the atmospheric air) by atomic absorption with microwave pre-treatment as a product of motor vehicle wear in St. Petersburg was developed. In the article, the author gives different ways of sampling for testing. One of the rubber samples was taken from one area no larger than 5x5 cm on one tyre (first sampling option), the second sample was taken cumulatively from all tyre sides around its circumference (second sampling option). Tests of selected samples were carried out allowing conclusions to be drawn about the optimal sampling method. A comparative analysis has been made of the test results of samples taken by different methods from the car tyre surface. Based on the comparative analysis conclusions were made about the homogeneity of the tire composition. Various physical and chemical methods of sample preparation for the heavy metals determination are presented. In the course of the work the author selected the optimal conditions for sample preparation for testing allowing to obtain the maximum possible extraction of the analyte at the stage of sample preparation. The atomic absorption method was used to determine the zinc content in automobile tire samples. On the basis of the results obtained conclusions about the optimal sampling methods and sample preparation were made and the test conditions of the samples were optimized.

scholarly journals ASSESSMENT OF PHYSICAL AND CHEMICAL QUALITY OF DRINKING WATER IN ELOBEID CITY, NORTH KORDOFAN STATE, SUDAN

2020 ◽  
pp. 293-296
Author(s):  
Halima Brima Gama Tigaidi ◽  
Dr. Mohammed Ismail Humaida ◽  
Dr.Kubra Ali Ebrahim Hammad
Keyword(s):  
Drinking Water ◽  
Residual Chlorine ◽  
Standard Procedures ◽  
Random Samples ◽  
Two Samples ◽  
Physical And Chemical Quality ◽  
Physical And Chemical ◽  
The City ◽  
Chemical Testing

This study was conducted in El-Obied City, North Kordofan State.The study comprised of 54 samples of water selected from houses, animal carts (karo), tankers, gerbas and main source of water bara basin and El-khazan (surface water )in El-Obied. The sample was divided over these sources following a process of stratified sampling combined with simple random samples with probability proportional to size of sample over the selected blocks where selection was at random in each stage. Physical and chemical testing of water was done using standard procedures. Two Samples of water were collected from the main sources of water in the City for physical and chemical analysis and 52 samples collected from blocks. The data were analyzed by computer. This study showed that 50% of the samples were without residual chlorine, and only 1.8% of samples were soft water. The study showed that 3.7% of samples had pH above WHO and SSMO Standard and also showed 18.5% of samples had turbidity above 5 NTU. KEY WORDS: Assessment, physical, chemical, drinking water, El-Obied

scholarly journals PENGARUH JENIS DAN JUMLAH ADSORBEN SERTA LAMA PERENDAMAN TERHADAP CUKA KAYU UNTUK PENGAWET MAKANAN (The Effect of Type And Amount of Adsorbent and Soaking Time to The Characteristics of Wood Vinegar for Food Preservatives)

2016 ◽  
Vol 8 (1) ◽  
pp. 17
Author(s):  
Rizka Karima ◽  
Fatmi Edwar
Keyword(s):  
Treated Wood ◽  
Total Sample ◽  
Food Preservatives ◽  
Soaking Time ◽  
Wood Vinegar ◽  
Chemical Content ◽  
Standard Quality ◽  
Physical And Chemical ◽  
Chemical Testing

Wood vinegar contains antibacterial compounds and antioxidants which is important as preservative in the food industry. This research aims to identify the characteristics of wood vinegar after deodorized, because the smell of wood vinegar spoils the odour of foods preserved with wood vinegar. The deodorizing used three types of adsorbent such as bentonite, active sand and zeolite. It was performed with three variations of weight: 10, 25, and 50 grams, and three variations of the soaking time: 2, 4, and 6 hours. The deodorised wood vinegar was organoleptically tested by 20 panelists to smell the deodorised wood vinegar. The five smallest samples were tested from the total 27 samples. However, the fifth and sixth were the same so the total sample tested was six samples. The physical and chemical testing results stated that the treated wood vinegar odor reduction has changed the chemical content, decreased the levels of total acids about 69,35 %, and decreased the phenol content about 51,51 %. It resulted in the obtained values did not meet the standard quality of wood vinegar. From the results of GC-MS spectra, there are entrained Silica that dissolved in the wood vinegar after deodorizing. In conclusion, the adsorbent able to eliminate the odor but degrade the quality of wood vinegar.Keywords: food preservative, wood vinegar, adsorbent

Restricted access molecularly imprinted polymers obtained by bovine serum albumin and/or hydrophilic monomers’ external layers: a comparison related to physical and chemical properties

The Analyst ◽  
2015 ◽  
Vol 140 (22) ◽  
pp. 7768-7775 ◽  
Author(s):  
Mariane Gonçalves Santos ◽  
Gabriel de Oliveira Isac Moraes ◽  
Maurício Gustavo Nakamura ◽  
Álvaro José dos Santos-Neto ◽  
Eduardo Costa Figueiredo
Keyword(s):  
Bovine Serum Albumin ◽  
Sample Preparation ◽  
Molecularly Imprinted Polymers ◽  
Bovine Serum ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Physical And Chemical ◽  
And Chemical Properties

RAMIP-BSA is the best material for sample preparation in terms of selectivity, protein exclusion, and adsorption.

Physical and Chemical Testing of Polymers

2003 ◽  
pp. 113-132
Keyword(s):  
Physical And Chemical ◽  
Chemical Testing
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