Uncertainty Calculation for the Determination of Chromium Oxide in Leather

Yıl 2022, Cilt: 7 Sayı: 2, 871 - 877, 30.12.2022

Sarwat Mahboob Rajkumar Dewanı Muhammad Kashif Pervez Tahira Ayaz

https://doi.org/10.30785/mbud.1181736

Öz

This work describes the uncertainty calculation for the determination of chromium oxide in leather. Following the various steps for the calculation of uncertainty which includes assembling a list of sources of uncertainty, with the help of basic formula used to calculate the measure and as all parameters cause an influence on the result because of the uncertainty value associated with it then the basic cause and effect diagram is made which shows the correlation between these and indicates their effect on the uncertainty of the result.

All individual sources of uncertainty are evaluated by quantification. Mass, purity, and molecular mass of potassium dichromate are calculated against the volume of sodium thiosulphate following the first step in the test method is the standardization of sodium thiosulphate with the primary standard, potassium dichromate. So the overall uncertainty value depends on the uncertainties associated with the mass, purity, and molecular mass of potassium dichromate.

Anahtar Kelimeler

Leather, chromium oxide, uncertainty, quality assurance, ISO/IEC 17025

Destekleyen Kurum

Pakistan Council of Scientific and Industrial Research

Proje Numarası

01

Teşekkür

Special thanks to the Pakistan Council of Scientific and Industrial Research, Leather Research Centre, Pakistan as this work has been carried out at its premises. The article complies with national and international research and publication ethics. Ethics committee permission was not required for the study. This article was presented in the II. International Architectural Sciences and Applications Symposium as an abstract paper. It was later expanded for this Journal.

Deride Krom Oksit Tayini için Belirsizlik Hesaplaması

Öz

Bu çalışma, deride krom oksit tayini için belirsizlik hesaplamasını açıklamaktadır. Ölçümü hesaplamak için kullanılan temel formül yardımıyla ve tüm parametreler kendisiyle ilişkili belirsizlik değeri nedeniyle sonuç üzerinde bir etkiye neden olduğundan, belirsizlik kaynaklarının bir listesinin bir araya getirilmesini içeren belirsizliğin hesaplanması için çeşitli adımların ardından bunlar arasındaki korelasyonu gösteren ve sonucun belirsizliği üzerindeki etkisini gösteren temel neden-sonuç diyagramı yapılmaktadır.

Tüm bireysel belirsizlik kaynakları niceleme ile değerlendirilir. Potasyum dikromatın kütlesi, saflığı ve moleküler kütlesi, sodyum tiyosülfatın hacmine göre hesaplanır ve test yöntemindeki ilk adım, sodyum tiyosülfatın birincil standart olan potasyum dikromat ile standardizasyonudur. Dolayısıyla genel belirsizlik değeri, potasyum dikromatın kütlesi, saflığı ve moleküler kütlesi ile ilişkili belirsizliklere bağlıdır.

Anahtar Kelimeler

Deri, krom oksit, belirsizlik, kalite güvencesi, ISO/IEC 17025

Proje Numarası

01

Kaynakça

• Determination of Chromium Oxide in Leather (2018). IULTCS/IUC 8:1. Northampton, UK: Society of Leather Technologists and Chemists (SLTC).
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