Milk and milk-based foodstuffs are considered as a primary source of nutrition to human health. Therefore, monitoring of hazardous material in powdered milk is important for the safety of public health. This study determines the concentrations of primordial radionuclides in powdered milk samples collected from the local markets of Dhaka city in Bangladesh using HPGe γ-ray spectrometry. The mean activity concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K for infant (9.6 ± 2.10, 9.0 ± 1.5 and 164.5 ± 3.7 Bq kg⁻¹, respectively) were found comparable to the people of all other ages (7.2 ± 3.7, 7.4 ± 1.5 and 143.2 ± 3.9 Bq kg^-1, respectively). Based on the typical consumption characteristics of powdered milk, the mean annual effective doses were found below the FAO/WHO (1995) and ICRP (2007) recommended limit of 1 mSv y^-1 for public exposure, in all investigated age groups (<2 y - >17 y). On the other hand, the doses for infant show close to the UNSCEAR (2000) reference ingestion dose constraints of 290 μSv y⁻¹, which may indicate a non-negligible concern for the infants’ health. The carcinogenic risks due to the ingestion of radionuclide show to be 6.4 × 10⁻⁴ (0–72 years) and 5.4 × 10⁻⁴ (>2 years) are significantly less than the ICRP (2006) suggested cancer risk factor of 2.5 × 10⁻³ based on the annual dose limit of 1 mSv for general public, thus discarded the radiation hazards via the consumption of local or imported powdered milk in Bangladesh. Overall, the measured data may help to establish national rules and regulations on powdered milk relating to radiological protection for the general people of Bangladesh.

牛奶和以牛奶为基础的食品被认为是人类健康的主要营养来源。因此，监测奶粉中的有害物质对公众健康安全具有重要意义。本研究使用 HPGe γ 射线光谱法确定了从孟加拉国达卡市当地市场收集的奶粉样品中原始放射性核素的浓度。发现婴儿的平均活性浓度²²⁶ Ra、²³² Th 和⁴⁰ K（分别为 9.6 ± 2.10、9.0 ± 1.5 和 164.5 ± 3.7 Bq kg ^-1）与所有其他年龄段的人（7.2 ± 3.7、7.4）相当± 1.5 和 143.2 ± 3.9 Bq kg ^-1， 分别）。根据奶粉的典型消费特征，在所有调查的年龄组（<2 岁）中，发现平均年有效剂量低于 FAO/WHO（1995 年）和 ICRP（2007 年）建议的公众暴露限值 1 mSv y ^-1 y - > 17 y）。另一方面，婴儿的剂量显示接近 UNSCEAR (2000) 参考摄入剂量限制 290 μSv y ^-1，这可能表明对婴儿健康的关注不可忽视。由于摄入放射性核素导致的致癌风险显示为 6.4 × 10 ^-4（0-72 岁）和 5.4 × 10 ^-4（>2 年），显着低于 ICRP（2006 年）建议的癌症风险因素 2.5 × 10 ^-3以普通公众1 mSv的年剂量限值为基础，从而消除了孟加拉国通过食用当地或进口奶粉而产生的辐射危害。总体而言，测量数据可能有助于制定与孟加拉国普通民众辐射防护相关的奶粉国家规则和法规。