Preliminärrapport för provningsjämförelse Preliminary Report for Proficiency Test

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1 Stockholm, 8 April 5 Mean Stdev Range CV% n Excl. Figurerna som visas är: Preliminärrapport för provningsjämförelse 5- Suspenderat material: torrsubstans, glödrest, susp7 Proverna i testet utgjordes av ett kommunalt avloppsvatten (Del A) och ett skogsindustriellt avloppsvatten (Del B). I preliminärrapporten är resultaten bara redovisade i figur- och tabellform här följer några förklaringar för tabellrubrikerna: medelvärde, konsensus standardavvikelse max - min variationskoefficient antal värden i de statistiska beräkningarna uteslutna (outliers, mindre-än värden) Slutrapport publiceras senast vecka på Youdendiagram där analysresultaten representeras av värdepar PROV+PROV. Talparens placering visar ifall resultaten innehåller systematiska eller slumpmässiga avvikelser. Ett cirkelformat spridningsmönster indikerar en slumpmässig fördelning utan påtagliga systematiska fel. Är spridningsmönstret däremot samlat ovalt utefter 5 linjen är materialet behäftat med systematiska avvikelser. Histogram (eller frekvensdiagram) där antalet fall i ett intervall (t.ex. x µg/l stort eller diagramstaplarnas bredd) är avsatt mot halterna i intervallet. En jämn och symmetrisk fördelning med högsta antalet fall i närheten av medelvärdet, tyder på ett normalt beteende hos det statistiska materialet. En asymmetrisk fördelning eller ett histogram med flera tydliga maxima tyder däremot på komplikationer t.ex. metodproblem, homogenitetsproblem eller dylikt. Vänligen, meddela oss om du upptäcker misstag vi kan ha gjort i preliminärrapporten så vi kan rätta till dem i slutrapporten. Preliminary Report for Proficiency Test 5- The samples in this test round were municipal wastewater (Part A) and paper industry wastewater (Part B). Results in the preliminary report are shown only in tables and charts. Explanations for the abbreviations used in the table heads and translations for some key words: Prov Mean Stdev Range CV% n Excl. The figures in the report are: Suspended solids: TSS, Fixed solids, Coarse particles Sample average, consensus standard deviation max - min coefficient of variation number of values used in the statistical calculations excluded values (outliers, less-than values) The final report will be published by week at Youden diagrams where the results are represented as value pairs Sample+Sample (PROV+PROV). The position of the value pairs reveals both systematic and random errors. Data scattered circularly around the centre are randomly distributed with no specific systematic errors; whereas data gathered along the 5 axis indicate the presence of systematic errors. Histograms (or frequency diagrams) where the result range is divided into equal intervals along the x-axis and each bar represents the number of results in that interval. A normal statistical material is characterised by an even, symmetrical distribution with the majority of data centred around the mean. An asymmetric distribution or more than one obvious maximum indicates complications, for example problems with the method, homogeneity or such. Kindly inform us of errors we may have made in the preliminary report so we can correct them in the final report. ACES Proficiency Tests Stockholm University SE-6 9 Stockholm Sweden Website: Marsha Hanson marsha.hanson@aces.su.se Marcus Sundbom Marcus.sundbom@aces.su.se

2 Preliminär Rapport Provningsjämförelse / Proficiency Test 5- Suspenderat material / Suspended solids Marsha Hanson Marcus Sundbom

3 Innehåll / Table of Contents STR torrsubstans / total suspended solids... SFR glödrest / fixed solids... S7 susp7 Vira... 6 Provmatriser del A: Kommunalt avlopp del B: Skogsindustri avlopp Sample matrices part A: Municipal wastewater part B: Paper industry wastewater

4 STR / TSS Susp, torrsubstans / Total Suspended Solids Analyskoder & metoder STR-STG SUBSTANS SUSPENDERAD TORKAD GLASFIBERFILTER Suspenderad substans. Glasfiberfilter. Torkat i 5 C. SS 8; SS-EN 87:5 STR-STM SUBSTANS SUSPENDERAD TORKAD MEMBRANFILTER Suspenderad substans. Membranfilter (.5 µm). Torkat i 5 C. SNV (SEPA) STR-XX SUBSTANS SUSPENDERAD TORKAD EGEN METOD Analysis codes & methods STR-STG SOLIDS SUSPENDED DRIED GLASS FIBER Suspended dried solids. Glass fiber filter. Dried at 5 C. SS 8; SS-EN 87:5 STR-STM SOLIDS SUSPENDED DRIED MEMBRANE FILTER Suspended dried solids. Membrane filter (.5 µm). Dried at 5 C. SNV (SEPA) STR-XX SOLIDS SUSPENDED DRIED OTHER METHOD

5 Outside Outside Antal Antal torrsubstans / TSS Del A / Part A STR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG STM 9.7 XX STR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG STM. XX STR Prov/Sample STR Prov/Sample mg/l mg/l

6 torrsubstans / TSS Del A / Part A Lab Code Method Prov Z-score Excl. Prov Z-score Excl. STG STG STG XX STG STG STG STG STG STG STG STG STG STG STG XX STG STG STG STM STG STG STG STG STG STG STG STG STG STG X STG..6 8 STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG

7 6 (STG) (STG) 7 (STG) 97 (XX) (STG) (STG) 75 (STG) 5 (STG) 8 (STG) 76 (STG) (STG) 5 (STG) (STG) 9 (STG) 7 (STG) 8 (STG) 89 (STG) 7 (STG) 7 (XX) 65 (STG) 7 (STG) (STG) (STG) (STG) 8 (STG) 8 (STG) (STG) 66 (STG) (STG) (STG) 56 (STG) 76 (STG) 5 (STG) 89 (STG) (STG) 5 (STG) 7 (STG) (STG) 5 (STG) (STM) 7 (STG) 7 (STG) 7 (STG) 9 (STG) 7 (STG) (STG) 6 (STG) 7 (STG) Z-Score for STR Prov/Sample, mg/l torrsubstans / TSS Del A / Part A STR, Youdendiagram Prov/Sample & % confidence Medel/Mean Medel/Mean 5º STG STM XX Prov/Sample, mg/l Z-Score Sample Z-Score Sample Questionable Unsatisfactory Lab Code (Method) 6

8 Outside Outside Antal Antal torrsubstans / TSS Del B / Part B STR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG STM STR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG STM STR Prov/Sample STR Prov/Sample mg/l mg/l 7

9 torrsubstans / TSS Del B / Part B Lab Code Method Prov Z-score Excl. Prov Z-score Excl. STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STG STM X X STG STG -.69 X STG STG STG STG STG STG STG STG.8. STG STG STG STG STG STG STG STG X 6 STG STG STG STG STG

10 Prov/Sample, mg/l 8 (STM) 7 (STG) 8 (STG) 6 (STG) (STG) 7 (STG) (STG) 55 (STG) (STG) 6 (STG) 66 (STG) 7 (STG) 5 (STG) 9 (STG) 8 (STG) 9 (STG) 95 (STG) 99 (STG) 7 (STG) 5 (STG) 6 (STG) 6 (STG) 5 (STG) 5 (STG) (STG) (STG) 7 (STG) 7 (STG) (STG) (STG) (STG) 9 (STG) 9 (STG) 69 (STG) 89 (STG) 7 (STG) 6 (STG) 99 (STG) 96 (STG) 7 (STG) (STG) 8 (STG) (STG) Z-Score for STR torrsubstans / TSS Del B / Part B Z-Score Sample Z-Score Sample Questionable Unsatisfactory Lab Code (Method) 5 STR, Youdendiagram Prov/Sample & % confidence Medel/Mean Medel/Mean 5º STG Prov/Sample, mg/l 9

11 SFR / TFS Susp, glödrest / Total Fixed Solids Analyskoder & metoder SFR-STG GLÖDREST SUSPENDERAD GLASFIBERFILTER Glödrest. Suspenderad (ej filtrerbart) substans. Glasfiberfilter. Bränt i 55 C. SS 8; SS-EN 87:5 Analysis codes & methods SFR-STG FIXED SOLIDS SUSPENDED GLASS FIBER Suspended (nonfiltrable) fixed solids. Residue on ignition. Glass fiber filter. Ignited at 55 C. SS 8; SS-EN 87:5

12 Outside Outside Antal Antal SFR / TFS Del A / Part A SFR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG SFR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG SFR Prov/Sample 5 SFR Prov/Sample mg/l mg/l

13 (STG) 7 (STG) 7 (STG) 8 (STG) 7 (STG) (STG) (STG) (STG) 7 (STG) (STG) 5 (STG) 7 (STG) 97 (STG) (STG) (STG) 76 (STG) 6 (STG) 7 (STG) 8 (STG) Z-Score for SFR SFR / TFS Del A / Part A Lab Code Method Prov Z-score Excl. Prov Z-score Excl. STG STG X STG STG STG STG 7. X. X 97 STG STG STG STG STG STG STG X X 6 STG STG X 7 STG X X 7 STG STG STG Z-Score Sample Z-Score Sample Questionable Unsatisfactory Lab Code (Method)

14 Prov/Sample, mg/l SFR / TFS Del A / Part A SFR, Youdendiagram Prov/Sample & % confidence 7 6 Medel/Mean Medel/Mean 5º STG Prov/Sample, mg/l

15 Outside Outside Antal Antal SFR / TFS Del B / Part B SFR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG SFR Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STG SFR Prov/Sample SFR Prov/Sample mg/l mg/l Lab Code Method Prov Z-score Excl. Prov Z-score Excl. STG STG STG STG STG STG STG STG STG X.5.6

16 Prov/Sample, mg/l 7 (STG) 9 (STG) (STG) (STG) 7 (STG) (STG) 7 (STG) 8 (STG) 7 (STG) Z-Score for SFR SFR / TFS Del B / Part B Z-Score Sample Z-Score Sample Questionable Unsatisfactory Lab Code (Method) SFR, Youdendiagram Prov/Sample & % confidence Medel/Mean Medel/Mean 5º STG Prov/Sample, mg/l 5

17 Susp7 Susp, grova partiklar / Coarse suspended solids Analyskoder & metoder S7-STV SUSP7 TORRSUBSTANS VIRADUK Suspenderad substans. Grova partiklar. Vira-duk (~7 µm) torkat i 5 C. SS 88 Analysis codes & methods S7-STV SUSP 7 COARSE SOLIDS SUSPENDED DRIED Suspended solids. Coarse particles. "Vira"-mesh (~7 µm) dried at 5 C. SS 88 6

18 Outside Outside Antal Antal Susp7 Del B / Part B S7 Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STV S7 Sample mg/l Method Mean Median Stdev Range CV% n Excl. Total STV S7 Prov/Sample S7 Prov/Sample mg/l mg/l Lab Code Method Prov Z-score Excl. Prov Z-score Excl. 5 STV STV STV STV STV STV STV STV STV

19 Prov/Sample, mg/l 9 (STV) 7 (STV) 6 (STV) 69 (STV) 67 (STV) 69 (STV) 55 (STV) 5 (STV) 8 (STV) Z-Score for S7 Susp7 Del B / Part B Z-Score Sample Z-Score Sample Questionable Unsatisfactory Lab Code (Method) S7, Youdendiagram Prov/Sample & % confidence Medel/Mean Medel/Mean 5º STV Prov/Sample, mg/l 8

20 ACES Institutionen för miljövetenskap och analytisk kemi Department of Environmental Science and Analytical Chemistry 5