Dynamic SQL query (Comma Separated)

I have a table structure like below:-

1. tbl_Employee Id int ename nvarchar(50) eaddress nvarchar(MAX)

2. tbl_Salary id int empid int salary_amt nvarchar(20)

Error: Conversion failed when converting the nvarchar value '3,1' to data type int. Note:- here in above error 3 and 1 is id of employee.

my query is :- select * from salaryInfo where empid in ('3,1')

when above qurey execute then mentioned error will showing. please solve the query so that record related to empid can be the output.