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按地方标准规定方法(以下称原法)检查羧甲基淀粉钠中硫酸盐和重金属,笔者发现检查结果偏高。通过试验分折,认为这是由于样品前处理时加入了无水碳酸钠的原因。
According to local standards (hereinafter referred to as the original method) to check the sodium carboxymethyl sulfate and heavy metals, I found the test results are high. Through the test points, this is because the sample pretreatment added anhydrous sodium carbonate reasons.