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The quality guaranteeSimply reliable.Quality is second nature for us. Over 100 years ofcompetence and leadership in the field of analysis areinconceivable without the high quality demands wemake of ourselves. We are a company that has beencertified according to DIN EN ISO 9001 ever since1992 and according to DIN EN ISO 14001 since 2001.The quality of the Spectroquant ® test kitsStringent raw-material controls, effective inprocesscontrols, and thoroughly documentedend-product controls are the guarantees for theconsistently high quality of our test kits. Everybatch that comes off the production lines isgiven its own batch certificate, meaning thatyou do not need to run a quality control ondelivery of the kits yourself. The batch certificates,which you can find on the internet athttp://photometry.merck.de, can also be usedfor official audit purposes.Many Spectroquant ® tests are officially recognizedby the American enviromental-protectionagency as suited for determinations in drinkingwater and wastewater and bear the corresponding“USEPA Approved” seal of quality.22
Validation of the analytical methodsValidation here means the testing of theperformance capacity of a given analyticalmethod. The characteristic data of the methodobtained in our development laboratories –measuring range, limit of detection, accuracy,selectivity, sensitivity, calibration function, androbustness of the method – are all documented.These data are quality characteristics andform the basis for quality assurance in routineanalysis.Certificate for the suitability ofSpectroquant ® test kits for self-monitoringThe characteristic method data for each testkit, determined according to standardizedprocedures, are summarized in a quality certificate.This certificate guarantees the consistentquality of all batches that have been suppliedto customers so far. Both the quality certificatesas well as batch certificates for eachSpectroquant ® test kit can be accessed on theweb at http://photometry.merck.de.Quality of the Spectroquant ® photometersMeasuring rangeWorking range within which the methodyields reliable results.The same principles also apply to the productionof the photometers. Each instrument is accompaniedby a test report that not only documentsthe optical tests (photometric accuracy, linearity,reproducibility, wavelength accuracy), but alsoconfirms the electrical safety.Sensitivityindicates the degree to which a resultchanges relative to the signal of themeasurement system. This can be shownin quantitative terms by the gradient ofthe calibration curve.Lower Limit of Detection (LLD)the smallest content of an analyte,the result for which may be taken asindicating the presence of the analytewith a sufficient statistical probability.Method Detection Limit (MDL)is that content of an analyte, the resultfor which may be taken as indicatingthe presence of the analyte with a highstatistical probability (equivalent to thelower limit of the measuring range).Confidence intervalEvery measurement value bears therisk of error, even the results for thecalibration curve. The confidenceinterval expresses the range in whichthe “true” curve lies.Standard deviation of the methodabsolute measure of the precision.Coefficient of variation for the methodrelative measure of the precision.Accuracymeasure for the approximation of theresult to the “true” value, a summaricalterm for precision and accuracy.23
Page 1 and 2: The many coloursof quality.Security
Page 3 and 4: The Spectroquant ® analysis system
Page 5 and 6: Sum parameterssuch as COD are conve
Page 7 and 8: The reagent test kitsSimply inexpen
Page 9 and 10: •This method is USEPA-approved, i
Page 11 and 12: The Piccos are available for variou
Page 13 and 14: Robust constructionThe Spectroquant
Page 15 and 16: Quality assuranceAnalytical Quality
Page 17 and 18: Spectroquant ® NOVA 400the easy-to
Page 19 and 20: The reagents for sample pretreatmen
Page 21: Standard digestion programmesStanda
Page 25 and 26: You have the choiceIn the AQA1 mode
Page 27 and 28: Checking the complete systemStandar
Page 29 and 30: Safety informationWe stock a compre
Page 31 and 32: MALAYSIAMerck Sdn BhdPhone +60 (0)

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