BRINGING TOGETHER ACADEMICS, PRACTITIONERS, ENGINEERS AND SUPPLIERS OF CONSUMABLES AND INSTRUMENTATION IN 2017
A three-day conference in conjunction with LAB AFRICA AND ANALYZERS AFRICA is to be highlighting advances in Analytical Chemistry, Statistical Method, Method Validation and Chemometrics, Reference Materials, Laboratory Automation, Cement and Materials Science and Industrial Analysers.
Solutions for Water Analysis
Lovibond® Water test kits, available from Lasec, for the environmental and industrial sectors for precise determination of: drinking water; waste water; surface and ground water; untreated water and effluents; through to cooling water and boiler water. The Lovibond® range of electronic photometers, visual comparators, easy-to-use test kits and dip slides combine with the stability and quality of Lovibond® reagents to enable rapid yet accurate measurement of: parameters from Acidity to Zinc; pH; Temperature; BOD; COD; Turbidity; Biocides; TVC and E. coli.
One such product from Lovibond® that is particularly popular for simple field testing of a range of parameters such as chlorine, COD, Fluoride and Copper, is the MD100 photometer
which uses high quality interference filters with long-life LEDs as a light source without any moving parts in a transparency sample chamber. The units supply accurate, reproducible results very quickly.
Other major advantages include ease of operation, ergonomic design, compact dimensions and safe handling. The calibration and software-based adjustment options mean that the MD 100 is also suitable for use as a testing instrument. The tests are conducted using either Lovibond tablet reagents with long-term stability and a guaranteed minimum 5 or 10 year shelf life, VARIO powder reagents or liquid reagents.
A wastewater operator contacted Hanna Instruments looking for a portable solution for measuring pH and dissolved oxygen in their aeration tank. The wastewater plant was measuring their pH in real time as well as monitoring and controlling their aeration pumps with a DO controller, but needed new portable equipment to validate their process measurements.
Hanna Instruments recommended the HI98196 Portable pH and DO Meter. The HI98196 is a waterproof portable Multiparameter meter with a multisensory probe.
The probe features two sensor inputs: a potentiometric input for either a pH or pH/ORP sensor, and a dissolved oxygen input for a galvanic DO sensor.
The operator liked the ability to measure ORP in addition to pH and DO, as ORP is often used to monitor the nitrification process in aeration tanks. The wastewater operator was pleased that they could simultaneously measure and view pH, ORP, DO, and temperature with one instrument.
The HI98196 probe has a weighted shield to protect the sensors and ensure the probe sinks within the tank, allowing the operators to easily take measurements at various depths. The galvanic DO probe was appreciated as it has a quick start up time, unlike their previous polarographic DO probe which required 10-15 minutes to polarize before calibration and measurement could be performed. The HI98196 provided a durable, accurate, and convenient solution for taking measurements in their aeration tank.
Analytical Chemistry is a rapidly developing field in many industries and applications. Refinements in analytical instrumentation have allowed smaller samples to be analysed which has unlocked previous barriers to forensic, geochronology and environmental applications.
The remarkable improvements in hyphenated analytical methods such as GC-MS, LC-MS, LC-FTIR, LC NMR, CE-MS, etc over the last two decades have significantly broadened their applications in the analysis of biomaterials, natural products and environmental chemistry.
The ISO17025:2005 standard of laboratory competency under clause 5.5 requires that laboratories conduct method validation of their analytical methods in order to declare the methods fit for purpose.
Laboratories are required to validate accuracy of the data produced and be able to report an estimated measurement uncertainty. Existing procedures to measurement uncertainty are being challenged by a variety of new approaches.
An important tool in recognising a number of aspects of quality in measurement and are used for calibration, method validation and estimation of measurement uncertainty, for internal quality control as well as proficiency testing purposes. Generally the demand for reference material exceeds supply in terms of the range of materials and availability.
ISO Guide 34 is an internationally recognised document available to assure the competency of reference materials produced. Users must be cautious and seek clear evidence of the quality and traceability of the property values of materials from suppliers.
One of the advantages to automation is faster processing with improved repeatability and reproducibility of analytical data. Automated systems as less likely to have variances in reagent quantities and in chemical reaction conditions. Typically productivity is increased since human constraints, such as time constraints, are no longer a factor.
Efficiency is generally improved as robots can work continuously. Automation can also establish safer working environments since hazardous compounds do not have to be handled. Additionally automation allows operators to focus on other tasks that are not repetitive.
Cement, concrete, lime and associated building materials are widely used in construction materials.
As the strength, durability and economic benefits of these materials become better known, the demand for increased research and accompanying charecterisation of materials becomes increasingly important.
Similarly, advances in metal alloys, polymers, catalysts and composite materials require 0n-going research and development.
In recent decades industrial analysers have made their debut and are today found in a variety of industries. On-line systems offer real-time elemental and compositional analysis of bulk raw materials moving on a conveyor belt to the detection of metal or foreign objects in foodstuffs.
Online analysers utilise a variety of excitation and detection systems including X-ray fluorescence, X-ray diffraction, infra-red, mass spectrometry and gamma neutron activation. Other applications, include, FTIR in gas analysis for the detection and determination of multiple gas species in stack emissions and process monitoring.
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