To establish a rapid detection method of chloride ion in organic fertiliser with test paper as the carrier.Chloride ion test pa-pers were prepared by selecting a suitable carrier and optimizing the preparation conditions.The rapid detection method of chloride ion in organic fertilizer was established through the preparation of standard colorimetric card.The established method was compared with the national standard method to test the commercial samples,and the chloride ion in the sample solution was determined by standard(20 mg·L-1)recovery.The relative error of the results using this method and the national standard method was between±20%,and the standard recovery rate were 100%.This method is simple,fast,accurate and requires no instrument assistance.It can be used for the semi-quantitative detection of chloride ion in organic fertiliser.
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