Determination of Lead in Solder by The Use of Pyromellitic Acid

Öz

This study is concerned with the use of new titrant in the determination of lead in solder . The titrant chosen was pyromellitic acid. The titrations were carried out at pH 3.5 at 250C constant temperature and the ionic strength of the medium was adjusted with sodium nitrate.The determinations carried out on three standard and one commercial solder samples, revealed that the determination of lead can be made with high accuracy by the use of this titrant . The data also show that pyromellitic acid is a much better titrant than sulfuric acid . The data obtained was found to be in good compliance with those obtained with atomic absorption spectrophotometry. This new titration method developed is highly rapid and the results were found accurate and repeatable.

Anahtar Kelimeler

• Ion selective electrodes , potentiometry , titration , pyromellitic acid , solder, lead

Piromellitik Asitle Lehimde Kurşun Tayini

Öz

Bu çalışmada lehimde kurşun tayini için yeni bir titrant kullanılmaya çalışılmış ve titrant olarak piromelitik asit seçilmiştir. Tayinler, pH 3,5\' ta, 25ºC sabit sıcaklıkta yapılmış, ortamın iyonik şiddeti sodyum nitrat ile ayarlanmıştır. Üç standart numune ve ticari bir lehim numunesinde yapılan kurşun tayinleri ile ilgili sonuçlar, bu titrantın kalay ve antimon içeren numunelerde kurşunun yüksek bir doğrulukla tayin edilebileceğini göstermiştir. Ayrıca kurşunun titrasyonu için piromellitik asitin sülfürik asitten daha iyi bir titrant olduğu belirlenmiştir. Sonuçlar atomik absorpsiyon spektrofotometresi ile elde edilen sonuçlarla karşılaştırılmış ve sonuçların uyum içinde olduğu görülmüştür. Geliştirilen bu titrasyon yönteminin oldukça hızlı, sonu&ccThis study is concerned with the use of new titrant in the determination of lead in solder . The titrant chosen was pyromellitic acid. The titrations were carried out at pH 3.5 at 250C constant temperature and the ionic strength of the medium was adjusted with sodium nitrate.The determinations carried out on three standard and one commercial solder samples, revealed that the determination of lead can be made with high accuracy by the use of this titrant . The data also show that pyromellitic acid is a much better titrant than sulfuric acid . The data obtained was found to be in good compliance with those obtained with atomic absorption spectrophotometry. This new titration method developed is highly rapid and the results were found accurate and repeatable.İyon-seçici elektrot, potansiyometri, titrasyon, piromellitik asit, lehim, kurşun.Ion selective electrodes , potentiometry , titration , pyromellitic acid , solder, lead Tam Metin

Anahtar Kelimeler

• İyon-seçici elektrot, potansiyometri, titrasyon, piromellitik asit, lehim, kurşun.