Matczak W, Chmielnicka J
Pol J Occup Med. 1989;2(4):376-88.
An analytical procedure for simultaneous determination of soluble and insoluble Cr III and Cr VI compounds in welding fumes has been proposed. In the welding fume samples collected on a membrane filter, total chromium was determined with atomic absorption spectrophotometry (AAS). Glass filters with collected samples were divided into two parts. In one part of the sample, soluble and insoluble chromium was determined by means of AAS. The separation of soluble chromium III and VI was carried out on diphenylcarbazide resin. In the second part of the sample total chromium VI was determined by means of the colorimetric method with s-diphenylcarbazide. The difference in the results of these determinations allowed the calculation of the content of total Cr III, Cr III insolub. and Cr VI insolub. The results of determining chromium compounds in welding fumes samples collected in the welder's breathing zone and in experimental chambers are also presented in this paper. The content of total chromium in the fumes determined by AAS (from a membrane filtr) and that calculated from the sum of soluble and insoluble chromium (from a glass filter) were concordant and within the limits of the admissible error for the method. Total chromium content in welding fume samples collected individually was found to range from 2.4-4.2%. The percentage of particular chromium compounds as compared to total chromium (100%) amounted: total Cr III--34%, total Cr VI--66%, soluble chromium--66% and in this Cr III--20% and Cr VI--43%, insoluble chromium--34% and in this: Cr III--14% and Cr VI--20%.
提出了一种同时测定焊接烟尘中可溶性和不溶性Cr III和Cr VI化合物的分析方法。在膜滤器上收集的焊接烟尘样品中，用原子吸收分光光度法（AAS）测定总铬。收集有样品的玻璃滤器分为两部分。在一部分样品中，用AAS测定可溶性和不溶性铬。可溶性铬III和VI在二苯卡巴肼树脂上进行分离。在样品的第二部分中，用s-二苯卡巴肼比色法测定总铬VI。这些测定结果的差异使得能够计算出总Cr III、不溶性Cr III和不溶性Cr VI的含量。本文还给出了在焊工呼吸区和实验室收集的焊接烟尘样品中铬化合物的测定结果。用AAS（从膜滤器）测定的烟尘中总铬含量与由可溶性和不溶性铬之和（从玻璃滤器）计算出的总铬含量一致，且在该方法允许误差范围内。单独收集的焊接烟尘样品中总铬含量为2.4 - 4.2%。特定铬化合物占总铬（100%）的百分比为：总Cr III——34%，总Cr VI——66%，可溶性铬——66%，其中Cr III——20%，Cr VI——43%，不溶性铬——34%，其中：Cr III——14%，Cr VI——20%。
