Việc xác định hàm lượng thiếc trong không khí khu vực làm việc là hết sức cần thiết. Trên thế giới đã đưa ra nhiều phương pháp xác định thiếc trong không khí. Tuy nhiên, ở Việt Nam, nghiên cứu xác định hàm lượng thiếc trong không khí còn rất hạn chế và chưa có phương pháp chuẩn. Do đó việc nghiên cứu “Định lượng thiếc trong không khí bằng phương pháp quang phổ hấp thụ nguyên tử không ngọn lửa (GF-AAS)” là điều có ý nghĩa khoa học và thực tiễn. | For optimization of pyrolysis and atomization temperature, the studies was performed by varying of parameter investigated while all other parameters were fixed as values showed on the Table 1. The lower pyrolysis temperature and atomization temperature, the lower sensitivity and selectivity. In contrast, higher pyrolysis temperature and atomization temperature, the higher intensity and selectivity. However, the higher temperature may be losing sample during pyrolysis and atomization steps. As a result, the lower sensitivity should be achieved. The pyrolysis and atomization temperature curves were showed in the Figure 1. As can be seen in the Figure 1, the optimum temperatures for pyrolysis and atomization were 1000 °C and 2200 °C, respectively. These temperatures were the best compromise between maximum intensity and minimum background signal. In addition, peak profile was resolved within only 3 seconds. These temperatures have been checked by employing with spiked matrix- matched solutions. In addition, peak profile of atomization process has also been investigated as an alternative parameter for both temperature selection.
