lead analyzer Articles

X-ray fluorescence analysis can be used to quickly and easily analyze samples in solid, powder, and liquid states nondestructively, and is therefore widely used as a screening technique for compliance with the RoHS/ELV directives. A large amount of lead-free solder is used for surface-mount circuit boards. Here we evaluated the sensitivity of analysis of Pb, Cd, Ag, and Cu in lead-free solder ...

Nov. 16, 2011

By Shimadzu Scientific Instruments Inc

PFOS is an extremely stable compound with strong carbon - fluorine bonds, and reports of its accumulation in wildlife and the environment have attracted international attention and concern, leading to the designation of PFOS as a persistent organic pollutant (POP).The persistent nature of PFOS prevents oxidative decomposition using wet chemical oxidation TOC analyzers; however, the Shimadzu ...

Jun. 30, 2016

By Shimadzu Scientific Instruments Inc

This research studies the behavior of a fully confined air pocket under the effect of water pulses induced by a water hammer phenomenon using several experimental tests in a pressurized transient condition. A compressed air vessel (CAV) has been tested under transient conditions to show its ability to absorb the pressure surges and to demonstrate the energy storage capability of the air ...

Dec. 18, 2015

By IWA Publishing

The effect of downstream valve closure scheduling was analyzed to find optimal closure parameters that lead to the minimal maximum pressure head in the water distribution system. Several valve closure strategies were explored, combining the known valve performance curve (change in flow as a function of change in valve's opened area) with unknown valve closure curve (change in valve's opened ...

Dec. 13, 2015

By IWA Publishing

Dr. Rick Russo, Executive Chairman of Applied Spectra and a senior scientist at Lawrence Berkeley National Laboratory, shares his thoughts on shifting trend in the world of chemical analysis towards reducing sample preparation and direct solid analysis instrumentation with higher detection sensitivity and expanded elemental coverage. In this ...

Jun. 27, 2017

By Applied Spectra, Inc. (ASI)

Excess nitrogen in urban river networks leading to eutrophication has become one of the most urgent environmental problems. Combinations of different aeration and biofilm techniques was designed to remove nitrogen from rivers. In laboratory water tank simulation experiments, we assessed the removal efficiency of nitrogen in both the overlying water and sediments by using the combination of the ...

May 29, 2016

By IWA Publishing

Oxidative decomposition of aqueous organic pollutant malachite green (MG) was studied in a dielectric barrier discharge reactor operated under ambient conditions. Total organic carbon content analysis confirmed the mineralization of the pollutant leading to the formation of carbon dioxide, which was confirmed by an infrared analyzer. Typical results indicated that the degradation rate increases ...

Feb. 17, 2013

By IWA Publishing

This white paper explains how to make accurate daily weight calibration measurements by minimizing the associated uncertainty. The extent to which a number of physical influences can affect the weighing performance - and therefore the measurement accuracy - is often under-estimated or unaccounted for. This can lead to uncertainties which do not fulfil the requirements of the applied regulations. ...

Mar. 25, 2015

By Mettler - Toledo Int. Inc

The Challenge In 2006, Linde AG merged with The BOC Group to form The Linde Group (Linde), a leading gases and engineering company with almost 48,000 employees working in more than 100 countries worldwide. Following the merger, Linde needed the capability to collect and analyze data from hundreds of global reporting centers. Changes in data also had to be seamlessly and quickly updated ...

Jun. 21, 2012

By cr360, part of UL EHS Sustainability - a UL Company

The objectives of this study were to estimate an aggregate price elasticity of demand for municipal water in Saudi Arabia, and to analyze the welfare impact of raising the municipal water tariff. The study utilized available aggregated data (Ministry of Water and Electricity, 1999–2008), and regression techniques to specify water demand functions within the frame of the increasing block tariff ...

May 5, 2016

By IWA Publishing

In water treatment by microfiltration and ultrafiltration, a major concern is the integrity loss or failure of membrane induced by onsite operations, potentially leading to permeate water contamination. This study aims to provide a better understanding of the phenomena responsible for membrane damage by analyzing its causes and effects. The role of sodium hypochlorite exposure conditions and the ...

Apr. 2, 2013

By IWA Publishing

Northern bobwhite (Colinus virginianus) and scaled quail (Callipepla squamata) from the Rolling Plains ecoregion in Texas/Oklahoma were evaluated for organochlorine pesticides (OCs), Pb, and Hg. Of all OCs analyzed, only p,p'‐DDE and p,p'‐DDD were found in a few composite liver samples. Similarly, a small fraction of tissue samples had detectable levels of Hg (liver and breast) or Pb exceeding ...

Feb. 6, 2015

By John Wiley & Sons, Ltd.

In 1998, the City of Minneapolis designed and implemented an innovative public outreach program to provide free access to soil testing for lead content to all Minneapolis residents. Soil testing kits were made available through local hardware stores, gardening centers and community groups. Citizens could either bring in samples to local merchants where city employees performed on-the-spot ...

Jan. 1, 1

By Thermo Scientific Niton Analyzers

CK Environmental was retained by Ze-Gen, to conduct a diagnostic emissions test program on their pilot plant in New Bedford, Massachusetts. Ze-gen is a leading developer and integrator of waste gasification technology which converts construction and demolition waste (C&D) and municipal solid waste (MSW) into near zero-emissions syngas and electrical energy. The ...

Jul. 17, 2013

By CK Environmental, Inc.

An inter-basin water transfer project is one of the effective ways to resolve the problem of an uneven distribution of water resources. Temporal and spatial variations in rainfall in different basins greatly affect water supply and demand in inter-basin water transfer projects, leading to risks to the operation of the water transfer projects. This paper applies a Bayesian network model to analyze ...

Dec. 31, 2010

By IWA Publishing

Uncertain parameters in the transient analysis of pipe networks lead to uncertain responses. Typical uncertainties are nodal demand, pipe friction coefficient and wave speed, which not only are imprecise in nature but also change significantly over time. Exploiting the fuzzy set theory and a simple scheme of the simulated annealing method, a conceptual model is developed. It can take into ...

Sep. 24, 2012

By IWA Publishing

The combustion process has always been considered having the potential for a hazardous event which could lead to personnel injury or loss of production. To mitigate this risk, the process industry is now implementing Safety Instrumented Systems which can identify hazardous operating conditions and correctly respond in such a way to bring the combustion process back to a safe operating condition ...

Mar. 31, 2012

By AMETEK Process Instruments

The objective of this study was to design and implement prototype software for capturing field data and automating the process for reporting and analyzing the distribution of mercury. The four phase process used to design, develop, deploy and evaluate the prototype software is described. Two different development strategies were used: (1) design of a mobile data collection application intended to ...

Feb. 28, 2005

By Springer

The European legislation of the pollution of industrial wastewater shows a high degree of heterogeneity. This fact implies that there is a market failure with relevant consequences. Within the European Union, each Member State performs a specific transposition of the Water Framework Directive 2000/60. The member states introduce different sanitation fees to correct water pollution. In this ...

Jul. 20, 2015

By IWA Publishing

Time-varying moments models based on Pearson Type III and normal distributions respectively are built under the generalized additive model in location, scale and shape (GAMLSS) framework to analyze the nonstationarity of the annual runoff series of the Weihe River, the largest tributary of the Yellow River. The detection of nonstationarities in hydrological time series (annual runoff, ...

Sep. 16, 2014

By IWA Publishing