laboratory sample Articles
-
LabrePor Web-based Laboratory Sample Tracking
Introduction INCOGEN, Inc. is a global leader in providing customized informatics solutions for corporations, institutions and laboratories of all types and sizes. INCOGEN’s latest software system, LabrePort™, is a web-based sample tracking system which supports biosafety and other laboratories in biological sample inventory management. Based on INCOGEN’s GenePort® software, ...
-
Cleaning without material loss
Cleaning without material loss: Hydraulic Easy Cleaning-Construction reduces cleaning of the Single-shaft shredder and facilitates work processes Many materials have to be comminuted before further processing - this includes different chips and stamped parts made of plastic and metal, but also valuable precious metals such as gold and silver as well as laboratory samples. In this process, a part ...
-
Nitrates/nitrites concentration estimation in wastewater samples using transmittance curve models optimized by evolutionary computation techniques
This paper presents an application of evolutionary computation algorithms in the estimation of the concentration of nitrates/nitrites in water. Specifically, we start from the measured transmittance curves of a water sample and a model of the curve consisting of a mixture of polynomial, Fermi and Gaussian functions. An evolutionary programming algorithm is then used to obtain the optimal ...
-
Spectral in-situ analysis of NO2, NO3, COD, DOC and TSS in the effluent of a WWTP
Abstract: An in-situ UV spectrometer was applied to the effluent of a WWTP in Switzerland and calibrated using a multivariate calibration algorithm based on PLS regression. Except for nitrite, the calibration was based on comparative measurements of the effluent in the plant laboratory. Samples made of stock solution added to three different matrices prepared in the EAWAG laboratory were used for ...
-
Field Screening Methods for the Presence of DNAPL, Superfund Site, southern California
Characterizing the lateral and vertical extent at a Dense Non Aqueous Phase Liquid (DNAPL) impacted site can prove to be a challenging task. Field methods employed to verify the presence of DNAPL have included the use of down-hole Ultraviolet Induced Florescence technologies, the application of down-hole detection materials such as dye impregnated fabrics, and the installation of monitor wells ...
-
Expansive Soils under Cyclic Drying and Wetting
An approach was developed to study the swell-shrinkage behavior of expansive soil samples in the laboratory under the action of the actual load to which the soil will be subjected in the field. The fatigue phenomenon due to cyclic drying and wetting has been under investigation, and this paper describes in detail the modified oedometer used in this investigation and the testing procedure adopted. ...
-
What `Total` means, in heavy metal detection
For in-process and on-line measurements of heavy metal content in industrial samples there is no time for special and time consuming laboratory-type sample preparation. All sample preparation must be done continuously in one step: Interference influences must be eliminated. Oxidation stages have to be taken into account (or separated and excluded). Complexes have to be destroyed to free the ...
-
Modelling biological Cr(VI) reduction in aquifer microcosm column systems
Several chrome processing facilities in South Africa release hexavalent chromium (Cr(VI)) into groundwater resources. Pump-and-treat remediation processes have been implemented at some of the sites but have not been successful in reducing contamination levels. The current study is aimed at developing an environmentally friendly, cost-effective and self-sustained biological method to curb the ...
-
Particle size characterization of oak wood leachate: chemical oxygen demand and toxicity distribution within different fractions
Oak wood leachate obtained from two storage facilities (storage pound and ditch) in a wood-based industry, and leachate generated by a laboratory leaching test, were characterized in seven categories regarding particle size distribution (PSD) (raw leachate, ≤20 μm, ≤10 μm, ≤1.2 μm, ≤13 nm, ≤5 nm and ≤2 nm). The PSD followed a normal ...
-
UK Health and Safety Laboratory samples with Axetris mass flow controllers - Case study
Proficiency testing ensures workplace & consumer safety The Health and Safety Laboratory (HSL) runs a state-of-the-art atmosphere generation system for recreating polluted atmospheres and accurate loading of standards of hazardous materials such as VOCs. These standards are used for conformity testing by participating laboratories as part of proficiency testing schemes. Axetris' mass flow ...
By Axetris AG
-
Implementing an On-Site Drinking Water Monitoring System in Indigenous Communities Across Canada
Status of Drinking Water in Indigenous Communities Indigenous communities including First Nations reserves across Canada have a notorious history of poor or inconsistent drinking water quality Many communities (55 as of Mar. 25, 2021) are under long-termdrinking water advisories, meaning potable tap water has not been available for several years The Canadian Government has a program to ...
-
COMMINUTION OF NUTS – GENERATION OF REPRESENTATIVE SAMPLES
DETAILED SAMPLE PREPARATION OF NUTS ACCORDING TO REGULATION (EG) NO. 401/2006 WITH TIPS, APPROACHES AND PHOTOS OF THE INDIVIDUAL STEPS With the REGULATION (EG) no. 401/2006 of the COMMISSION of 23rd February 2006 binding standards for sampling procedures and analysis methods for the official testing of the mycotoxin content of food stuffs for example nuts was established. THE TASK IN THE ...
-
Silver nanoparticle toxicity to Atlantic killifish (Fundulus heteroclitus) and Caenorhabditis elegans: A comparison of mesocosm, microcosm and conventional laboratory studies
The use of silver nanoparticles in consumer products and industrial applications, as well as recent detection in waste streams, has created concern over potential impacts on aquatic ecosystems. The effect of complex environmental media on silver nanoparticle toxicity was investigated using wetland mesocosms and smaller scale microcosms. Mesocosms were dosed with 2.5 mg Ag/L as gum arabic (GA) ...
-
Sample Size for Laboratory Calibration of Subsurface Neutron Moisture Gauges
The estimation of adequate sample size is critical to all laboratory methods of calibration of neutron moisture gauges. Neutron gauge response is a function of the true sample geometry rather than an arbitrarily defined spherical geometry. A two-group solution is obtained for neutron flux in a homogeneous, finite, cylindrical sample. The theoretical flux distributions for this solution and for ...
-
How can I keep my samples secure and tamper proof?
The first stage of any test is to collect a sample. Whether it’s water, biological tissues, or a sample from a production line, it must be representative of the bulk and not be altered in order to give accurate results. Most samples will have to be transported after they are collected – this might be just a few meters from a production line to the test room, or could be a lengthy ...
-
Chlorinated solvents
The initial PSG survey identified TCE source areas that did not agree with the GPR survey findings. Based on these results, a subsequent PSG survey was performed to further characterize the site and better define the source areas identified in the initial survey. Analytical results were provided to the client within four (4) days of receipt of samples at the laboratory for both surveys. The ...
-
Pilot and Industrial-Scale Experimental Investigation of Numerically Optimized Cyclones
A new geometry of reverse-flow gas cyclones obtained by numerical optimization was shown at the laboratory scale to be significantly more efficient than other high-efficiency designs. However, it is usually recognized that experimental results obtained with laboratory-scale or sampling cyclones cannot be extrapolated to pilot or industrial scales. The present paper confirms, at these larger ...
-
Residential spill in VA
Laboratory analysis of soil samples showed high values of TPH/DRO showing an initial value of 18,800 and 8,300 ppm and the samples of soil analyzed after treatment with VaporRemed showed a value of 290 ppm and 210 ppm. Both these values are below the stipulated 500 ppm of TPH/DRO. The TPH in the drain water after flushing with the product showed values below the detection levels. The project was ...
-
CH#952 - Oil Contaminated Soil
SITE OWNER: A National Overnight Express Package Company SITE SURVEY: Site and geological surveys revealed a contaminated area north of the facility and west of a diesel tank pit. The cause of the contamination was the result of two (2) underground storage tanks (UST™). One tank contained waste oil while the other contained new oil. Both tanks had been removed. A monitor well was ...
-
Evaluation of an MPN test for the rapid enumeration of
Pseudomonas aeruginosa in hospital watersIn this study, the performance of a new most probable number (MPN) test (Pseudalert®/Quanti-Tray®) for the enumeration of Pseudomonas aeruginosa from hospital waters was compared with both international and national membrane filtration-based culture methods for P. aeruginosa: ISO 16266:2006 and UK The Microbiology of Drinking Water – Part 8 (MoDW Part 8), which both use ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you