Stockholm, april 6 Preliminärrapport för provningsjämförelse 6- Suspenderade ämnen, Glödrest, Grova partiklar (Susp7/Vira) Proverna i denna omgång var ett spikat kommunalt avloppsvatten (Del A) och ett spikat skogindustriellt avloppsvatten (Del B). I preliminärrapporten är resultaten redovisade i figur- och tabellform här följer några förklaringar för tabellrubrikerna: Mean Stdev Range CV% n medelvärde, konsensus standardavvikelse max min variationskoefficient antal värden i de statistiska beräkningarna uteslutna resultat (outliers, mindre-än värden) Youdendiagram Analysresultaten representeras av värdepar Sample + Sample. 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 utefter 5 linjen är materialet behäftat med systematiska avvikelser. Histogram (eller frekvensdiagram) Hela värdeintervallet är uppdelade i ett antal del-intervall. Stapelhöjden motsvarar antalet mätvärden i del-intervallet. En normal fördelning av det statistiska materialet är jämn och symmetrisk med högsta antalet mätvärden i närheten av medelvärdet. En asymmetrisk fördelning eller flera tydliga maxima tyder på komplikationer som kan bero metoder, homogenitet eller dylikt. Kriterier för beräkning av z-scores i denna rapport För parametrar med minst sex godkända resultat beräknas z-score om proverna bedöms vara homogena och stabila m.a.p. den aktuella parametern. För parametrar med fyra eller fem godkända resultat beräknas z-score om CV% (standardavvikelse /medelvärde) är mindre än % och det finns högst ett outlier. Mindre-än värden och uppenbara rapporteringsmissar räknas inte som outliers. För parametrar som inte uppfyller villkoren presenteras grundläggande statistik, deltagarnas resultat, samt Youdendiagram utan konfidensintervall. Vänligen, meddela oss om du upptäcker misstag vi kan ha gjort i preliminärrapporten så vi kan rätta till dem i slutrapporten. Slutrapporten beräknas vara klar senast vecka 9. ACES Provningsjämförelser Stockholms universitet 6 9 Stockholm Sweden Hemsida: http://enviropro.itm.su.se Marsha Hanson: marsha.hanson@aces.su.se Marcus Sundbom: marcus.sundbom@aces.su.se
Stockholm, April 6 Preliminary Report for Proficiency Test 6- Total suspended solids, Fixed suspended solids, Susp7 The samples in this test round were a spiked municipal wastewater (Part A) and a spiked 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: Mean Stdev Range CV% n average, consensus standard deviation max min coefficient of variation number of values used in the statistical calculations excluded values (outliers, less-than values) Youden plots The results are represented as value pairs where Sample is plotted against Sample. The position of the value pairs reveals both systematic and random errors. Data scattered circularly around the intersection of the means are randomly distributed with no specific systematic errors. Data distributed along the 5 axis indicate the presence of systematic errors. Histograms (or frequency diagrams) The result range is divided into equal intervals along the x-axis with each bar representing 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 with the methods or homogeneity. Criteria for the calculation of z-scores in this report For parameters with at least six acceptable results, z-scores are calculated if the samples are homogenous and stabile with respect to that parameter. For parameters with four or five acceptable results, and no more than one outlier, z-scores are calculated if the CV% (standard deviation/mean) is less than %. Less-than values and obvious clerical errors are not counted as outliers. No z-scores are calculated for parameters that do not fulfil the above conditions. Only the basic statistics, results of the participants and the Youden plot (without the confidence interval) are presented. Kindly inform us of errors we may have made in the preliminary report so we can correct them in the final report. A final report can be expected by May. ACES Proficiency Tests Stockholm University SE-6 9 Stockholm Sweden Website: http://enviropro.itm.su.se Marsha Hanson: marsha.hanson@aces.su.se Marcus Sundbom: marcus.sundbom@aces.su.se
Preliminär Rapport Provningsjämförelse 6- Suspenderade ämnen Proficiency Test 6- Suspended solids Marsha Hanson Marcus Sundbom ACES, Stockholms universitet
Innehåll / Table of Contents STR Suspenderade ämnen / Total suspended solids... SFR Glödrest / Fixed solids... 8 S7 Grova partiklar (Susp7/Vira) / Susp7... 7 Provmatriser / Sample matrices A Kommunalt avloppsvatten, spikat Municipal wastewater, spiked B Skogsindustriellt avloppsvatten, spikat Paper industry wastewater, spiked
STR / TSS Suspenderade ämnen / 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-XX SUBSTANS SUSPENDERAD TORKAD EGEN METOD Annan metod. Ange standard eller beskriv metoden. 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-XX SOLIDS SUSPENDED DRIED OTHER METHOD Other method. Specify standard or describe the method.
Sample A, mg/l 9.97.6..86.9..75.8 5. 5.6 Antal 9.97.5.9.65..77..89.5 5. Antal STR / TSS Del A / Part A STR mg/l Sample A Method Mean Median Stdev Range CV% n Total.9.5.7 5. 8.5 STG.9.5.7 5. 8.6 XX.5.5.8..8 STR mg/l Sample A Method Mean Median Stdev Range CV% n Total.7.68.96 5.7 7.56 STG.76.75.96 5.7 7.55 XX.8 9 8 7 6 5 9 8 7 6 5 STR Sample A mg/l STR Sample A mg/l STR Part A Youdendiagram 7 6 5 95% confidence Medel/Mean Medel/Mean 5º STG XX 9 9 5 6 7 Sample A, mg/l
STR / TSS Del A / Part A Lab Method Sample Z-score Sample Z-score STG.69 -.7.58 -.6 STG.5 -..5 -.9 8 STG. -.87. -.56 7 STG.5.5.6.89 7 XX.. 7..5 X 9 STG...8.6 STG. -.77. -.67 6 STG.5.5.6.89 STG.6.57.9.6 9 STG..6..8 5 STG....5 56 STG..6..8 66 STG -.7 -.85 7 STG...7.99 89 STG.76 -.6..6 97 XX -.87.8 -.98 7 STG..5..8 STG. -.68. -.56 STG..5.7.99 7 STG.. 5.7.7 7 STG.6 -.66. -.77 75 STG. -.7.9 -.87 8 STG.75 -.6. -.5 STG. -.87. -.5 STG.85.87.5.6 STG.8.8.86 -.95 6 STG...7 -.8 5 STG -.87 -.77 8 STG 5.95 -.77 5 STG.7 -.7..6 STG..6.5.5 5 STG..5. -.6 STG. -.7.6 -.5 STG. -.87.8.6 STG.5 -.. -.6 6 STG...6.89 65 STG. -.9.6 -.5 7 STG. -.68.6 -.5 7 STG 6.6 X..8 7 STG.7.7.75. 7 STG..6.6 -.5 7 STG..67.96 76 STG.78.8.7. 5
STR / TSS Del A / Part A z-score for STR - - - - Lab Code (Method) 66 (STG) 75 (STG) 7 (STG) (STG) (STG) 97 (XX) (STG) 5 (STG) (STG) 8 (STG) (STG) (STG) (STG) (STG) 7 (STG) (STG) 65 (STG) 8 (STG) 6 (STG) 5 (STG) 5 (STG) 7 (STG) 89 (STG) 9 (STG) 56 (STG) 7 (STG) (STG) 7 (STG) 8 (STG) 9 (STG) (STG) 7 (STG) 6 (STG) (STG) (STG) 76 (STG) 6 (STG) 7 (STG) 7 (STG) 5 (STG) 7 (STG) 7 (XX) 7 (STG) z-score Sample z-score Sample Unsatisfactory Questionable 6
Sample B, mg/l 5.9 5 55. 57. 59. 6. 6.5 65.6 67.7 69.8 Antal 5.9 5.87 5.8 56.8 58.78 6.75 6.7 6.69 66.66 68.6 Antal STR / TSS Del B / Part B STR mg/l Sample B Method Mean Median Stdev Range CV% n Total 6.8 6..77 7.7 6. 5 STG 6. 6..67 7.7 6.9 XX 67. STR mg/l Sample B 7 6 5 STR Sample B mg/l Method Mean Median Stdev Range CV% n Total 58.5 58.8.79 8.7 6.5 5 STG 58. 58.8.9 8.7 6. XX 68.7 9 8 7 6 5 STR Sample B mg/l STR Part B Youdendiagram 7 7 69 67 65 6 6 59 57 55 5 95% confidence Medel/Mean Medel/Mean 5º STG XX 5 9 7 7 9 5 5 55 57 59 6 6 65 67 69 7 7 Sample B, mg/l 7
STR / TSS Del B / Part B Lab Method Sample Z-score Sample Z-score STG 56.79 -.95 5.7 -.8 7 STG 6.8. 6.5.57 7 XX 67..78 68.7.7 9 STG 6.6. 58. -. STG 6. -.5 56 -.6 7 STG 55 -. 55 -.88 9 STG 66.7.68 6..9 5 STG 59.5 -. 59.7 75 STG 57.5 -.76 56. -.5 89 STG 6.8.9 6.8.5 95 STG 67..8 57. -.8 96 STG 56.8 -.95 5.5 -. 99 STG 6 -. 6.7 7 STG 58.6 -.7 59..7 STG 6.7.6 59.. STG 59. -. 57.9 -. 5 STG 6.. 59.5. 8 STG 68.7. 69.7.99 7 STG 5.5 -.56 5. -.65 STG 6..8 6.6. 9 STG 6.7 57 -.6 6 STG 6..96 58.9.5 STG 5 -.9 55 -.88 7 STG 55 -. 5 -.5 5 STG 57 -.9 59.7 55 STG 68.. 6..96 6 STG 6.8.8 59.7 6 STG 58 -.6 5 -.5 66 STG 6.9.9 6..5 69 STG 58 -.6 59.7 99 STG 56.6 -. 5. -.6 STG 6.7 59.7 STG 59. -.6 59.5. 8 STG 59. -.7 56. -.6 STG 6.8. 57.8 -. 5 STG 6 -. 57.5 -. 6 STG 6.8.8 55.7 -.7 9 STG 6.. 58.8. STG 58.75 -. 57.55 -. 6 STG 57. -.9 5. -.7 STG 59.6 -. 6..75 7 STG 58. -.6 6..96 7 STG 6. -. 58.8. 7 STG 6..7 58.8. 7 STG 59.5 -. 5 -.9 8
STR / TSS Del B / Part B z-score for STR - - - - Lab Code (Method) (STG) 7 (STG) 99 (STG) 7 (STG) 7 (STG) 7 (STG) (STG) 96 (STG) 6 (STG) 6 (STG) 75 (STG) 8 (STG) 5 (STG) (STG) (STG) 69 (STG) (STG) 5 (STG) 6 (STG) 7 (STG) (STG) 9 (STG) 5 (STG) 7 (STG) (STG) 9 (STG) 5 (STG) 7 (STG) (STG) 6 (STG) 99 (STG) 7 (STG) (STG) 7 (STG) (STG) 9 (STG) 6 (STG) 89 (STG) 95 (STG) (STG) 66 (STG) 55 (STG) 9 (STG) 7 (XX) 8 (STG) z-score Sample z-score Sample Unsatisfactory Questionable 9
SFR / FSS Glödrest / Fixed suspended solids Analyskoder & metoder SFR-STG GLÖDREST SUSPENDERAD GLASFIBERFILTER Glödrest. Suspenderad (ej filtrerbart) substans. Glasfiberfilter. Bränt i 55 C. SS 8; SS-EN 87:5 SFR-XX GLÖDREST SUSPENDERAD EGEN METOD Annan metod. Ange standard eller beskriv metoden. 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 SFR-XX FIXED SOLIDS SUSPENDED OTHER METHOD Other method. Specify standard or describe the method.
Sample A, mg/l 8.75 9.5 9.85 9.555 9.85.95.65.65.95.75 Antal 8.75 9.5 9.5 9.585 9.865.5.5.75.985.65 Antal SFR / FSS Del A / Part A SFR mg/l Sample A Method Mean Median Stdev Range CV% n Total 9.98 9.56.89.5 8.7 7 STG 9.996..86.5 8.6 5 XX 9.5 9.5.7..76 SFR Sample A SFR mg/l Sample A Method Mean Median Stdev Range CV% n Total 9.59 9.6.76. 7.57 7 STG 9.6 9.6.759. 7.88 5 XX 9. 9....5 mg/l SFR Sample A mg/l SFR Part A Youdendiagram 95% confidence 9 Medel/Mean Medel/Mean 5º STG XX 8 7 7 8 9 Sample A, mg/l
(STG) (STG) (STG) (STG) 97 (XX) (STG) 7 (STG) 7 (XX) 6 (STG) 76 (STG) (STG) 7 (STG) 7 (STG) 7 (STG) (STG) 5 (STG) 6 (STG) 7 (STG) (STG) z-score for SFR SFR / FSS Del A / Part A Lab Method Sample Z-score Sample Z-score STG 9.59 -.78 9.56 -.9 STG 8.76 -.8 8.76 -. 6 STG 9.56 -. 9. -.5 STG.9. 9. -.6 5 STG.5.7.. 97 XX 9. -.85 9. -.68 7 STG 9. -.6 9. -.5 STG..5..8 STG 8.76 -.8 9.6 -. 7 XX 9. -.7 9. -. STG 9.5 -.67 8.95 -.88 STG 75.8 79.7 X 9.5.8 X STG.6-7.6 X.8-6.6 X 6 STG....9 7 STG..68 8.8 -.9 7 STG..59 9.8.9 7 STG.... 7 STG..5 9.87.9 76 STG 9.5 -.67 9.5 -.9 z-score Sample z-score Sample Unsatisfactory Questionable - - - - Lab Code (Method)
Sample B, mg/l 6.85 7.5 8.65 9.5.5.85.5.65.5.95 Antal 6.575 7.65 7.555 8.5 8.55 9.5 9.55.5.95.985 Antal SFR / FSS Del B / Part B SFR mg/l Sample B Method Mean Median Stdev Range CV% n Total 8.86 9..59. 7. 9 STG 8.86 9..59. 7. 9 SFR Sample B SFR mg/l Sample B Method Mean Median Stdev Range CV% n Total 9.85 8..69 8.7 8.7 9 STG 9.85 8..69 8.7 8.7 9 mg/l SFR Sample B mg/l SFR Part B Youdendiagram 8 6 8 6 95% confidence Medel/Mean Medel/Mean 5º STG 6 8 6 8 Sample B, mg/l
7 (STG) 7 (STG) (STG) (STG) (STG) 7 (STG) 7 (STG) (STG) 7 (STG) 8 (STG) 5 (STG) z-score for SFR SFR / FSS Del B / Part B Lab Method Sample Z-score Sample Z-score STG 9.58. 7.75 -.6 STG 9. 8. -. 5 STG 68 9. X 67.5.57 X 7 STG 6.6 -.6 6.8 -.96 STG.7.5.7.9 8 STG 8.7 6.55 X.7. X STG 7.9 -.59 7.9 -.5 7 STG 8. -.5 5..8 7 STG 9.7.59.5. 7 STG..5..6 7 STG 7. -.6 6.5 -.6 z-score Sample z-score Sample Unsatisfactory Questionable - - - - Lab Code (Method)
S7 Grova partiklar (Susp7/Vira) / Susp7 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 5
Sample B, mg/l.96.78.6 5. 6. 7.6 7.88 8.7 9.5. Antal.955.895 5.85 6.775 7.75 8.655 9.595.55.75.5 Antal S7 Del B / Part B S7 mg/l Sample B Method Mean Median Stdev Range CV% n Total 7.7 7.5.8 8.5 7.57 9 STV 7.7 7.5.8 8.5 7.57 9 S7 Sample B S7 mg/l Sample B Method Mean Median Stdev Range CV% n Total 6.9 5.7. 7. 6. 9 STV 6.9 5.7. 7. 6. 9 mg/l S7 Sample B mg/l S7 Part B Youdendiagram 7 5 9 7 5 95% confidence Medel/Mean Medel/Mean 5º STV 9 7 7 9 5 7 9 5 7 Sample B, mg/l 6
69 (STV) 7 (STV) 69 (STV) 67 (STV) 6 (STV) 55 (STV) 8 (STV) 7 (STV) 5 (STV) z-score for S7 S7 Del B / Part B Lab Method Sample Z-score Sample Z-score 5 STV.5.8 8.75 7 STV 7.6.8..79 69 STV 5. -.77 5.7 -.6 8 STV.8. 7..8 55 STV 7.5.5 7.7.6 67 STV 7 -. 5 -.56 69 STV -.9 -. 6 STV 7.5.5 5.5 -. 7 STV.5 -..88 -.5 z-score Sample z-score Sample Unsatisfactory Questionable - - - - Lab Code (Method) 7
ACES Institutionen för miljövetenskap och analytisk kemi Department of Environmental Science and Analytical Chemistry 6