Sample Reception

1 Sample Reception, Storage, and Traceability throughout the Analytical Process 

Samples may be received by any process acceptable within the concepts of ISO/IEC 17025. On receipt, the transport container must first be inspected and its integrity or any irregularities documented. The transfer of the samples from the courier or other person delivering the samples must be documented, including, at a minimum, the date, the time of receipt, and the name and signature of the laboratory 

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There is adequate separation of sample reception, preparation, clean-up, and measurement areas to ensure that the quality of the work carried out is not compromized. 

Any preparatory work that may be done whilst collecting samples will reduce the cost of sample reception (e.g. drying, compositing samples, selecting duplicate or replicate samples, etc.). 

Customer Analysis work order Sample reception... 

The use of air-bome ultrasound for the excitation and reception of surface or bulk waves introduces a number of problems. The acoustic impedance mismatch which exists at the transducer/air and the air/sample interfaces is the dominant factor to be overcome in this system. Typical values for these three media are about 35 MRayls for a piezo-ceramic (PZT) element and 45 MRayls for steel, compared with just 0.0004 MRayls for air. The transmission coefficient T for energy from a medium 1 into a medium 2 is given by... 

Other Nuclei. Although most nmr experiments continue to involve H, or both, many other nuclei may also be utilized Several factors, including the value of I for the nucleus, the magnitude of the quadmpolar moment, the natural abundance and magnetogyric ratio of the isotope, or the possibihty of preparing enriched samples, need to be considered. The product of the isotopic parameters can be compared to the corresponding value for providing a measure of relative sensitivity or receptivity. Table 1 summarizes these factors for a number of isotopes. More complete information may... 

Figure 2. Schematic representation of the reactor system computer-controlled pumps (PI, P2) pump controllers (fc) reactor (CSTR) reception vessel valves (S1-S4) monomer and initiator storage vessels (Tl, T2). (a) Digital input from GPC injection valve (b) analogue output from GPC (c, d) digital outputs to recorder chart drive and event marker (e, f) analogue outputs for pump set-point adjustment (g,h) reactor feeds (i) reactor output (j-m) digital outputs to reception system valves (n) manual sampling of products by GPC,...

Trapped radicals on samples with different storage conditions and reaction conditions are usually determined by ESR. Modification of PVC by radiation-grafting technique is an attractive method to improve the mechanical strength, printing ink adhesion, and adhesive receptance. Wang... 

All water samples were collected in amber-polyethylene terephtalate (PET) bottles and were kept at 4°C during shipment. Upon reception in the laboratory, samples were vacuum filtered through 1 pm glass fiber filters, followed by 0.45 pm nylon membrane filters, and were stored in the dark at —20°C until analysis. 

From the foregoing discussion, it will be appreciated that sediments constitute the final natural compartment for reception of LAS that have not been degraded. The vertical profiles of the concentrations of the LAS homologues in the sediment and interstitial water found for three sampling stations are shown in Fig. 6.5.4. There is a pronounced decrease in LAS concentration with depth, particularly in the first few centimetres, which may be related to greater discharges of effluent into... 

The field test was conducted from May 2003, towards the end of the Severe Acute Respiratory Syndrome (SARS) outbreak in Hong Kong, until January 2004. The students taking part in the field tests were properly trained and equipped with medical safety equipment. Air samples collected at the reception area was designated as control samples (Fig. 12.9-12b). The Prototype Unit was located in the doctor s consultation room (Fig. 12.9-12c) and was operated 10 h/day, 6 days/week during the six months test period. 

Figure 12.9-12 (a) A drawing of the clinic floor plan, (b) picture of the reception area where control air samples were taken and (c) picture of the doctor s clinic room where field testing of the Prototype Unit was conducted. 

Tables 12.9-5 and 12.9-6 summarize the results of the three months period when weekly measurements were conducted. The temperature and humidity of the clinic is relative constant at around 23 °C and 80 %, but the bioaerosol level changes by the hour and day-to-day depending on the number of patients and outside air quality. The Prototype Unit was placed in the doctor s consultation room and the airflow was set at normal-speed (Fig. 12.9-12c), allowing a complete exchange of the room s air every 30 minutes. The air sample from the reception and doctor s consultation room were sampled within 20 minutes of each other. The data in the tables show that the airborne microorganisms in the doctor s consultation room remained higher compared to the reception area. However, this is a significant improvement when compared to the level when the Prototype Unit was not in use. Data obtained by measuring the inlet and outlet bioaerosol in the Prototype Unit indicated that 60 % and 67 % reduction in airborne bacteria and fungi was obtained, respectively. The performance was maintained during the six months test.

We have checked both of these predictions. We have sampled conversational groups in a number of different settings (including university canteens, receptions and fire practices). We have also undertaken detailed analyses of the topics of conversation (again, using both university canteens and other public places such as bars and trains). 

About the analysis of pesticides, water samples were collected in amber glass bottles and transported to the laboratory under cooled conditions (4°C). Upon reception, samples were filtered (0.4-pm membrane filters) and then stored at —20°C in the dark until analysis. Analysis was performed by a fully automated multiresidue analytical method based on online SPE-LC-MS/MS [27]. 

Documented and traceable transfer of a sample from the point of collection to reception at the testing laboratory. Volume 1(10). 

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