Quality Control Procedures in Herbicide Field Dissipation Studies

1997 ◽  
Vol 11 (4) ◽  
pp. 832-837 ◽  
Author(s):  
Michael R. Blumhorst ◽  
Thomas C. Mueller
Keyword(s):  
Quality Control ◽  
Environmental Impact ◽  
Experimental Approach ◽  
Recent Literature ◽  
Research Area ◽  
Field Conditions ◽  
Experimental Parameters ◽  
Control Procedures ◽  
Areas Of Concern

Characterization of herbicide dissipation under field conditions is an important component in determining the environmental impact of herbicides, and much information is available on this subject. However, this research area could be improved by standardizing and implementing several quality control procedures. The purpose of this review is to evaluate the recent literature on herbicide dissipation published in journals of the Weed Science Society of America. This review is not comprehensive with respect to all experimental parameters associated with field dissipation studies, but it is aimed at addressing specific areas of concern in the experimental approach to this research.

DRILLING FLUIDS AND THEIR ENVIRONMENTAL MANAGEMENT: CHARACTERISATION OF BASE FLUIDS AND THE INTRODUCTION OF QUALITY CONTROL PROCEDURES

1999 ◽  
Vol 39 (1) ◽  
pp. 628
Author(s):  
R. Papp ◽  
S.J. Fisher
Keyword(s):  
Quality Control ◽  
Environmental Impact ◽  
Base Fluid ◽  
Public Perception ◽  
Drilling Fluid ◽  
Gas Chromatography Mass Spectrometry ◽  
Drilling Fluids ◽  
The North ◽  
Invert Emulsion ◽  
Control Procedures

Since the early 1990s, a variety of invert emulsion base fluids have been introduced into the drilling fluid market. The chemical composition of these fluids has evolved with the focus on minimising the environmental impact of discharged cuttings that contain adhered drilling fluids.The trend within Australia and other regions in which drilling fluids are extensively used, is that the life span of these fluids has become increasingly shorter, due to environmental impact pressures from the regulatory authorities in the North Sea and Australia, as well as public perception within these regions.The Well Construction Department within Woodside Energy Ltd. (WEL) has identified the need to characterise these base fluids in a manner that was both reproducible and definitive. The need was driven by the availability of a large number of commercial base fluids claiming technical and environmental superiority and the requirement for robust quality control systems for the base fluids from production to discharge—a cradle to grave philosophy.To this end, a study was initiated in 1997 where several drilling fluids were analysed using gas chromatography- mass spectrometry (GC-MS) techniques. From this work, four classifications of invert emulsion, non-water based fluids (NWBF) have been identified. They include low toxicity oil based fluids (LTOBF), enhanced mineral oil based fluids (EMOBF), synthetic based fluids (SBF), and oxygen based fluids (OBF). The definition of these fluids and the rationale for this classification is presented here.The GC-MS characterisation has provided an insight into the structure of the base fluid, rheological characteristics, quality control/quality assurance, and in the future, the ability to develop a robust link to minimising environmental impact of the discharge.All of these benefits will aid in developing drilling fluids which achieve the technical objectives of drilling fluids as well as minimising the environmental impact. The quality control procedures for the base fluid also allow an auditable process for benchmarking with input from the regulator, operator, fluid service company and manufacturer.

Quality Assurance of Energy Dispersive Spectrometry Systems

1997 ◽  
Vol 3 (S2) ◽  
pp. 903-904
Author(s):  
E. B. Steel ◽  
R. B. Marinenko ◽  
R. L. Myklebust
Keyword(s):  
Quality Control ◽  
Standard Operating Procedure ◽  
Energy Dispersive ◽  
X Ray ◽  
Standard Procedures ◽  
Reliability Sensitivity ◽  
Control Procedures ◽  
Analysis System ◽  
Quality Instruments

Monitoring the performance capabilities of energy dispersive X-ray spectrometers (EDS) and related x-ray analysis electronics and software is important for determining and improving the reliability, sensitivity, and accuracy of the x-ray analysis system. In addition, there is a growing popularity of quality systems through laboratory accreditation and ISO 9000 related programs that require set quality control procedures for analytical instrumentation. Having similar standard procedures amongst labs would allow direct intercomparison of results. This intercomparison would help labs and manufacturers determine what are normal versus abnormal results and lead to higher quality instruments and analyses. We have been developing a standard operating procedure for the characterization of EDS x-ray analysis systems on electron beam instruments.We are designing the procedure to maximize the efficiency of each quality control (QC) measurement so that we spend as little time monitoring the analysis system as is possible. We first chose useful QC specimens and then designed data collection methods.

Studies and Application of Auger Monitoring System for Quality Control and Assurance of Al Bondpads

2016 ◽  
Author(s):  
Hua Younan
Keyword(s):  
Quality Control ◽  
Sample Preparation ◽  
Monitoring System ◽  
Failure Mechanisms ◽  
Wafer Fabrication ◽  
Contamination Level ◽  
Auger Analysis ◽  
Low Level ◽  
Monitoring Frequency ◽  
Control Procedures

Abstract In wafer fabrication (Fab), Fluorine (F) based gases are used for Al bondpad opening process. Thus, even on a regular Al bondpad, there exists a low level of F contamination. However, the F level has to be controlled at a lower level. If the F level is higher than the control/spec limits, it could cause F-induced corrosion and Al-F defects, resulting in pad discoloration and NSOP problems. In our previous studies [1-5], the theories, characteristics, chemical and physical failure mechanisms and the root causes of the F-induced corrosion and Al-F defects on Al bondpads have been studied. In this paper, we further study F-induced corrosion and propose to establish an Auger monitoring system so as to monitor the F contamination level on Al bondpads in wafer fabrication. Auger monitoring frequency, sample preparation, wafer life, Auger analysis points, control/spec limits and OOC/OOS quality control procedures are also discussed.

Emerging Techniques for the Characterization of Nano-Mechanical Properties of Integrated Circuit Components

2008 ◽  
Author(s):  
Nicholas Randall ◽  
Rahul Premachandran Nair
Keyword(s):  
Mechanical Properties ◽  
Quality Control ◽  
Integrated Circuits ◽  
Integrated Circuit ◽  
Manufacturing Process ◽  
Solder Bumps ◽  
Initial Work ◽  
Circuit Components ◽  
Materials Used

Abstract With the growing complexity of integrated circuits (IC) comes the issue of quality control during the manufacturing process. In order to avoid late realization of design flaws which could be very expensive, the characterization of the mechanical properties of the IC components needs to be carried out in a more efficient and standardized manner. The effects of changes in the manufacturing process and materials used on the functioning and reliability of the final device also need to be addressed. Initial work on accurately determining several key mechanical properties of bonding pads, solder bumps and coatings using a combination of different methods and equipment has been summarized.

scholarly journals Thermal Characterization of Recycled Materials for Building Insulation

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3564
Author(s):  
Arnas Majumder ◽  
Laura Canale ◽  
Costantino Carlo Mastino ◽  
Antonio Pacitto ◽  
Andrea Frattolillo ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Environmental Sustainability ◽  
Building Materials ◽  
Raw Materials ◽  
Natural Fibers ◽  
Thermal Characterization ◽  
Recycled Materials ◽  
Building Insulation ◽  
Operational Phase

The building sector is known to have a significant environmental impact, considering that it is the largest contributor to global greenhouse gas emissions of around 36% and is also responsible for about 40% of global energy consumption. Of this, about 50% takes place during the building operational phase, while around 10–20% is consumed in materials manufacturing, transport and building construction, maintenance, and demolition. Increasing the necessity of reducing the environmental impact of buildings has led to enhancing not only the thermal performances of building materials, but also the environmental sustainability of their production chains and waste prevention. As a consequence, novel thermo-insulating building materials or products have been developed by using both locally produced natural and waste/recycled materials that are able to provide good thermal performances while also having a lower environmental impact. In this context, the aim of this work is to provide a detailed analysis for the thermal characterization of recycled materials for building insulation. To this end, the thermal behavior of different materials representing industrial residual or wastes collected or recycled using Sardinian zero-km locally available raw materials was investigated, namely: (1) plasters with recycled materials; (2) plasters with natural fibers; and (3) building insulation materials with natural fibers. Results indicate that the investigated materials were able to improve not only the energy performances but also the environmental comfort in both new and in existing buildings. In particular, plasters and mortars with recycled materials and with natural fibers showed, respectively, values of thermal conductivity (at 20 °C) lower than 0.475 and 0.272 W/(m⋅K), while that of building materials with natural fibers was always lower than 0.162 W/(m⋅K) with lower values for compounds with recycled materials (0.107 W/(m⋅K)). Further developments are underway to analyze the mechanical properties of these materials.

Sign in / Sign up

Export Citation Format

Share Document